Understanding Flight Cancellations Post-Boarding

The prospect of a flight being cancelled after passengers have already settled into their seats is a scenario that raises considerable concern and confusion. While airlines strive for smooth operations, unforeseen circumstances can indeed lead to a flight's termination, even after boarding has commenced or concluded. This situation is distinct from a simple delay and typically involves a critical issue that renders the flight unsafe or impossible to operate. Passengers need to understand that such decisions are made with safety as the paramount consideration, often involving complex operational challenges and regulatory compliance.

When a flight is cancelled after boarding, it signifies a severe disruption that goes beyond typical operational adjustments. This usually happens when a critical safety issue is identified, a key piece of equipment fails, or a significant external factor arises that compromises the flight's viability. The airline's primary responsibility is to ensure the safety of everyone on board, and this responsibility supersedes all other considerations, including passenger convenience or commercial interests. Therefore, understanding the triggers for such an extreme measure is vital for passengers to manage their expectations and navigate the subsequent procedures effectively.

  • Flight cancellation after boarding is rare but possible.
  • Safety concerns are the primary driver for post-boarding cancellations.
  • Passenger rights and airline responsibilities are activated upon cancellation.
  • Rebooking and refunds are standard procedures following cancellation.

The Rarity and Reasons for Post-Boarding Flight Disruptions

Flight cancellations occurring after passengers have boarded are exceptionally uncommon. Airlines invest heavily in pre-flight checks and maintenance to prevent issues that would necessitate such a drastic measure. However, the aviation industry operates under stringent safety regulations, and if a critical problem emerges at any stage, it must be addressed. These problems often involve mechanical failures that are only detected or manifest during boarding or taxiing, severe weather events that develop rapidly, or critical crew availability issues that cannot be resolved in time.

The factors leading to a cancellation after boarding are typically critical and immediate. This might include a significant mechanical defect discovered during pre-departure checks, such as a hydraulic leak or a critical system malfunction. It could also involve a sudden and severe weather event, like an unexpected lightning storm or extreme wind shear, making takeoff unsafe. In some instances, a key crew member might become unexpectedly unavailable due to illness or other emergencies, and if a replacement cannot be found promptly, the flight may need to be cancelled. These are not minor inconveniences but rather substantial operational or safety impediments.

Passenger Rights and Airline Responsibilities

When a flight is cancelled after boarding, passengers are not left without recourse. Aviation regulations in many regions, such as those enforced by the U.S. Department of Transportation or the European Union's Regulation (EC) No 261/2004, provide passengers with specific rights. These typically include the right to rebooking on the next available flight, often with the same or a partner airline, or the right to a full refund for the unused portion of the ticket. The airline is obligated to provide reasonable care to passengers during such disruptions, which may include meal vouchers or accommodation if an overnight delay is necessary.

It is important for passengers to be aware that the specifics of their rights can vary based on the airline's policy, the type of ticket purchased, and the geographical region of travel. However, the fundamental obligation of the airline to ensure passenger safety and provide compensation or rebooking options remains. Understanding these rights empowers passengers to engage effectively with airline staff to secure the most appropriate resolution following a cancellation.

Materials Needed for Post-Boarding Cancellation Scenarios

Navigating a flight cancellation after boarding requires having essential information and documentation readily accessible. Think of these as your 'materials' for managing the situation. Primarily, you'll need your booking confirmation or ticket details, which contain your flight number, booking reference, and passenger names. This information is crucial for airline staff to quickly locate your reservation and assist you with rebooking or refund requests. Having identification, such as a passport or driver's license, is also fundamental, as airlines will need to verify your identity before making any changes to your booking.

Beyond the basic travel documents, it is beneficial to have contact information for the airline readily available. This could be a customer service phone number, an email address, or the airline's official app, which often provides real-time updates and rebooking options. If you booked through a third-party agent, like Expedia, having their contact details handy can also be useful, though it's often more efficient to deal directly with the airline during an in-flight cancellation event. Finally, a charged mobile phone is indispensable for communication and accessing digital travel documents.

Essential Documentation and Information

Your booking confirmation, often received via email, is your primary document. It should clearly state your name, flight number, date of travel, origin, and destination. Keep a digital copy readily accessible on your smartphone, and if possible, a printed copy as a backup. This document serves as proof of your travel plans and is the first thing airline representatives will ask for when assisting you. It helps them identify your specific booking amidst potentially many affected passengers.

Airlines may also require a government-issued photo ID to confirm your identity before processing any changes. This is a standard security procedure. Ensure your ID is current and easily accessible. If you have any special needs or requests documented with your booking, such as dietary restrictions or assistance for passengers with reduced mobility, having this information to hand can also expedite communication with airline staff.

Digital Tools and Communication Channels

In today's digital age, leveraging airline apps and official websites is often the quickest way to get information and rebooking options. Most major airlines have robust mobile applications that provide live flight status updates, delay notifications, and self-service rebooking tools. Download the app for your airline in advance and ensure you are logged in with your frequent flyer account or booking reference. This allows for proactive communication and potentially faster resolution of rebooking issues.

If you booked through an online travel agency (OTA), like Expedia, familiarize yourself with their app or website's customer support features. While the airline is responsible for the flight operation and cancellation resolution, the OTA is your point of contact for initial booking issues or if you encounter difficulties communicating directly with the airline. Having their contact information ensures you have a secondary channel for support.

Method: Steps to Take When a Flight is Cancelled After Boarding

When a flight is cancelled after boarding, the immediate priority is to remain calm and follow the instructions provided by the flight crew and ground staff. Airlines are required to make announcements and guide passengers on the next steps. Do not attempt to deplane until instructed to do so, as this can cause further delays and safety issues. Once you are deplaned, you will likely be directed to a specific area where airline representatives will be present to manage the situation.

Your goal is to secure your rebooking or refund as efficiently as possible. This means having your essential documents ready and being clear about your preferred resolution. The process can be chaotic, especially with a full aircraft, so patience and clear communication are key. Understanding the general procedure will help you navigate it more smoothly.

Immediate Actions on Board

Upon hearing the announcement of a cancellation after boarding, the flight crew will take charge. They will likely inform passengers about the reason for the cancellation, if feasible and appropriate to share, and provide instructions for deplaning. Listen carefully to all instructions given by the cabin crew and pilots. Remain seated until you are told it is safe to stand and move. Cooperate with the crew's directions to ensure an orderly disembarkation process. This is crucial for safety and to prevent further complications.

During this phase, avoid unnecessary questions to the crew, as their primary focus is on managing the immediate safety and deplaning of passengers. Save your detailed inquiries about rebooking or refunds for when you are safely off the aircraft and interacting with ground staff or customer service representatives.

Interacting with Airline Representatives

Once deplaned, you will need to locate the airline's customer service desk or a designated area for rebooking. Be prepared for potentially long queues. If the airline has a mobile app or website with self-service rebooking capabilities, use that first, as it might be faster than waiting in line. If you choose to speak with an agent, present your booking confirmation and ID clearly.

Clearly state whether you prefer to be rebooked on the next available flight or if you are seeking a refund for your ticket. If rebooking, inquire about options on your airline and any partner airlines. If the cancellation results in an overnight stay, confirm arrangements for accommodation, meals, and transportation as per airline policy and passenger rights. Always keep records of your interactions, including names of agents and reference numbers.

Securing Your Rebooking or Refund

When rebooking, compare the options presented. Ensure the new flight meets your travel needs regarding timing and destination. If the new flight is significantly delayed or inconvenient, you have the right to refuse it and opt for a refund. If you opt for a refund, confirm the amount and the expected timeline for processing, which can sometimes take several business days or weeks.

Always ask for written confirmation of your new booking or your refund request. This documentation will be invaluable if any discrepancies arise later. If your original booking included seat assignments or pre-paid services, ensure these are transferred to your new booking or refunded appropriately. This proactive approach helps prevent common oversights and ensures you receive all entitlements.

Tips for Managing Post-Boarding Flight Cancellations

Successfully navigating the disruption of a flight cancellation after boarding relies heavily on preparedness and a strategic approach. While the airline has responsibilities, your proactive steps can significantly ease the stress and ensure you achieve a satisfactory resolution. The key is to anticipate potential issues and have a plan in place, much like preparing for any significant travel disruption. This mindset helps transform a frustrating event into a manageable inconvenience.

The aviation environment is dynamic, and unexpected events can occur. By adopting a calm demeanor, staying informed, and knowing your entitlements, you can significantly improve your experience. This section offers practical advice to help you manage the situation effectively, from communication strategies to understanding your rights in more detail.

Stay calm and patient, as airline staff are managing a complex situation with many passengers; a cooperative attitude often leads to better outcomes.

Maintain Communication and Stay Informed

During a cancellation, information flow is critical. Keep your mobile phone charged and accessible. Continuously check airline notifications via their app, SMS, or email. If you are at the airport, pay attention to announcements and look for updated information on departure boards. Do not hesitate to politely approach airline staff if you are unclear about the process or your options, but do so strategically, perhaps after the initial rush has subsided.

If your original flight was part of a longer journey involving multiple legs or connections, inform the airline staff immediately about your onward travel plans. This allows them to assist in rebooking not just the cancelled segment but also any subsequent flights you might miss. Proactive communication about your entire itinerary is crucial.

Understand Your Entitlements

Familiarize yourself with general passenger rights before you travel, especially concerning flight cancellations. Regulations like those in the U.S. and EU offer substantial protections. These typically include rights to rebooking, refunds, and 'care' (meals, accommodation, transport) depending on the length of the delay and the distance of the flight. Know what constitutes 'extraordinary circumstances,' which may limit compensation, versus operational issues within the airline's control.

If you booked via a travel agent or credit card with travel insurance, check their policies as well. Your travel insurance might provide additional benefits, such as reimbursement for expenses incurred due to the cancellation, or assistance with rebooking if the airline's provisions are insufficient. Always keep receipts for any expenses you incur, as these may be claimable later.

Document Everything

Keep a detailed record of the event. This includes the flight number, date, time of cancellation announcement, the reason given (if any), and the names of any airline representatives you speak with. Note down reference numbers for any rebooking or refund requests. If you incur expenses for meals, transportation, or accommodation due to the cancellation, keep all itemized receipts. This meticulous documentation is vital for any subsequent claims or disputes.

Take photos of departure boards showing the cancellation status, or screenshots of app notifications. If there are any issues with your rebooked flight or refund, this evidence will be indispensable. Good record-keeping ensures that you can accurately recall events and present a strong case for your entitlements.

Variations in Flight Cancellation Policies

The specifics of how a flight cancellation after boarding is handled can vary significantly among airlines. While regulatory frameworks set a baseline, individual airline policies often add layers of detail concerning rebooking preferences, refund processing times, and the provision of care during disruptions. Understanding these variations is key to managing expectations and knowing what to ask for. This is particularly true when dealing with different ticket types or fare classes, as these can influence the options available to you.

Airlines may differentiate their policies based on factors like the length of the delay, the reason for cancellation, and whether the flight is domestic or international. Passengers should always refer to the airline's Conditions of Carriage and their specific passenger rights information, typically found on the airline's website, to understand the nuances applicable to their booking.

Airline-Specific vs. Regulatory Requirements

Regulatory bodies, such as the U.S. Department of Transportation (DOT) and the European Union Aviation Safety Agency (EASA) through Regulation (EC) No 261/2004, establish minimum passenger rights. For instance, in the U.S., if a flight is cancelled, passengers are entitled to a refund if they choose not to travel on an alternative flight offered by the airline. In the EU, passengers have rights to rebooking, refunds, and 'care' (food, accommodation) for significant delays or cancellations, depending on the circumstances.

However, airlines often go beyond these minimums, especially for their loyalty program members or those holding premium tickets. Some airlines might offer more flexible rebooking options, better accommodation during overnight stays, or direct cash compensation in addition to rebooking. Conversely, budget carriers might strictly adhere to the minimum requirements, offering fewer amenities. It's crucial to check the specific airline's policies to know what to expect.

Impact of Ticket Type and Fare Class

The type of ticket you purchase can greatly influence your options when a flight is cancelled. Non-refundable tickets, often the cheapest, typically still entitle you to a refund or rebooking if the *airline* cancels the flight. However, if you decide to cancel your own flight for personal reasons, these tickets usually forfeit the fare. Refundable tickets offer more flexibility but come at a higher cost.

Fare class also plays a role. Passengers in business or first class may receive more comfortable accommodation or priority rebooking compared to those in economy. Loyalty program status can also affect your treatment; elite members might have dedicated lines or receive special considerations. Always understand the terms associated with your specific fare when booking.

International vs. Domestic Flight Differences

Cancellation policies can differ for domestic and international flights. International travel often falls under multiple sets of regulations, including the Montreal Convention, which governs liability for international air carriers. This convention may provide additional compensation for damages resulting from delays or cancellations, especially if there are proven financial losses. However, claiming under the Montreal Convention can be a more complex process than standard rebooking or refund requests.

For international flights within regions like the EU, specific regulations (like EC 261/2004) are very comprehensive. For flights outside these regulated zones, airlines often rely more heavily on their own Conditions of Carriage, making it essential to review them thoroughly. Be aware that different countries may have varying consumer protection laws that could apply to your flight.

What Happens to Luggage and Personal Belongings?

When a flight is cancelled after boarding, the logistics of retrieving luggage and personal belongings becomes a significant concern for passengers. The process can be complex, as baggage has likely already been loaded onto the aircraft. Airlines must ensure that all passengers' checked baggage is accounted for and returned safely. This requires a systematic approach to prevent items from being lost or misplaced during the deplaning and rebooking process.

The handling of luggage post-cancellation is a critical operational task that requires coordination between ground crew, baggage handlers, and customer service agents. Passengers should be prepared for potential delays in retrieving their items and understand the procedures airlines typically follow to manage this aspect of the disruption.

Retrieving Checked Luggage

If your flight is cancelled after boarding and you have checked luggage, it will need to be retrieved from the aircraft. This process is managed by the airline's ground staff. Typically, passengers will be deplaned, and then directed to a baggage claim area where their luggage will be offloaded and made available for collection. This can take considerable time, especially if the aircraft is still at the gate or if multiple flights are experiencing disruptions simultaneously.

Be patient and listen for announcements regarding baggage collection. Have your baggage claim tags ready, as these are essential for identifying and collecting your checked items. If your luggage is not immediately available or if you suspect an item is missing, report it to the airline's baggage services desk before leaving the airport. They will initiate a trace for lost or delayed baggage.

Personal Items Left Onboard

Passengers often leave personal items in the overhead bins or under the seat in front of them. When a cancellation occurs after boarding, there's a risk these items might be inadvertently left behind during the hurried deplaning process. Airlines usually conduct a sweep of the cabin after passengers disembark to recover forgotten items. These items are then typically handed over to the airline's lost and found department.

If you realize you've left something behind, the first step is to contact the airline's lost and found department as soon as possible. Provide them with a detailed description of the item, your flight details, and your contact information. Many airlines have online forms for reporting lost items, which can expedite the process.

When Luggage is Misdirected or Delayed

In rare cases, especially during mass cancellations or severe weather events, luggage might be misdirected or delayed. If your checked bag does not arrive when expected, and you have already been rebooked on a new flight, you must file a Property Irregularity Report (PIR) with the airline. This report officially documents the issue and starts the process of locating your bag.

The airline is responsible for forwarding your luggage to your final destination once it is located, often at their expense. If you incur necessary expenses for essential items due to delayed luggage, keep all receipts, as you may be entitled to reimbursement from the airline, depending on their policy and passenger rights regulations. Always refer to the airline's specific policies on delayed baggage compensation.

Proactive Mitigation Strategies for Flight Disruptions

While you cannot prevent a flight cancellation after boarding, you can significantly mitigate its impact by adopting proactive strategies. These measures focus on preparation, information gathering, and contingency planning, ensuring that you are well-equipped to handle unexpected disruptions. Thinking ahead and having plans in place can turn a potentially disastrous travel experience into a manageable inconvenience, allowing you to reach your destination with minimal stress.

The goal of proactive mitigation is to reduce reliance on last-minute solutions and to be prepared for various scenarios. By investing a small amount of time in preparation before your journey, you can save yourself significant time, money, and frustration should a disruption occur. This approach emphasizes preparedness and adaptability.

Book flights with airlines known for good customer service and robust operational reliability, especially for critical travel.

Choosing Flights Wisely

When booking, opt for flights that are less prone to cancellation. Early morning flights often have a better on-time record than afternoon or evening flights, which are more susceptible to cascading delays. Flights that are not oversold, or those operated by airlines with a strong reputation for punctuality and customer care, can also reduce your risk. Consider the operational base of the airline; flights originating from their main hubs might be prioritized during disruptions.

If your travel is time-sensitive, consider booking a slightly earlier flight than strictly necessary. This buffer can absorb minor delays. For critical travel, investigate options for flying with different airlines or on different routes if your primary choice is disrupted. Sometimes, a slightly longer route with a higher chance of on-time arrival is preferable to a direct flight with a higher risk of cancellation.

Leveraging Travel Insurance and Credit Cards

A robust travel insurance policy can be invaluable. Look for policies that specifically cover trip cancellation and interruption due to airline issues, and that provide benefits for expenses like meals, accommodation, and rebooking costs when flights are cancelled. Understand the policy's terms and conditions, including any waiting periods or exclusions.

Many premium credit cards offer built-in travel insurance or trip delay/cancellation benefits when you use the card to book your flights. Familiarize yourself with these benefits before you travel. They can often cover costs that standard airline compensation might not, such as additional hotel nights or essential clothing and toiletries if your luggage is also delayed.

Preparing a 'Disruption Kit'

Assemble a small kit with items that can help you manage unexpected delays or cancellations. This might include a portable power bank for your electronic devices, essential medications, a change of clothes, toiletries, snacks, and a book or entertainment. Having these essentials readily accessible in your carry-on luggage can make a significant difference if you are unexpectedly stranded at the airport or require an overnight stay.

Ensure your carry-on bag is well-organized with all necessary travel documents, contact information for your airline, insurance provider, and any emergency contacts. A physical copy of your booking and itinerary can also be a lifesaver if electronic devices fail or connectivity is poor.

Troubleshooting Common Issues Post-Cancellation

Even with the best preparation, flight cancellations after boarding can lead to unforeseen complications. Understanding how to troubleshoot common issues can save you significant time and stress. These problems often arise from miscommunication, errors in rebooking, or unexpected costs. Being equipped with strategies to address them ensures that you can resolve matters efficiently and get back on track with your travel plans.

The key to troubleshooting is to remain systematic and informed. By knowing what to look for and where to seek help, you can overcome most obstacles that arise from flight disruptions. This section covers typical problems and their solutions.

Inaccurate Rebooking or Missed Connections

Sometimes, rebooking agents may make errors, leading to an incorrect flight being booked, or a crucial connection being missed on the new itinerary. If you notice an error immediately, politely point it out to the agent and request correction. If you are already on your next flight and realize there's an issue with a subsequent leg, contact the airline's customer service immediately. Use their app or a phone number to get in touch, as airport agents might be overwhelmed.

If a missed connection is due to the airline's cancellation and rebooking, they are responsible for getting you to your final destination. If their offered solution is unsatisfactory or leads to further delays, inquire about options with partner airlines or competitors, especially if your original booking had specific time constraints.

Disputes Over Refunds or Compensation

Refunds might be delayed, or the compensation offered might not align with your understanding of your rights. If you believe you are entitled to a refund or compensation that has not been provided correctly, gather all your documentation: booking confirmation, cancellation notice, receipts for expenses, and any correspondence with the airline. Contact the airline's customer relations department to formally dispute the decision or request an explanation.

If direct negotiation fails, you can escalate the issue. In the U.S., you can file a complaint with the Department of Transportation. In the EU, contact your national enforcement body. Travel insurance claims can also be pursued if applicable. Be persistent and keep all records organized.

Unforeseen Expenses and Reimbursement

When a cancellation forces you to incur unexpected costs for meals, accommodation, or essential items, ensure you understand the airline's policy on reimbursement. Keep all itemized receipts. If the airline initially refuses reimbursement or offers an amount less than your expenses, refer them to the relevant passenger rights regulations or your travel insurance policy. Present your case clearly with supporting documentation.

For expenses not covered by the airline, check if your travel insurance or credit card benefits apply. Filing a claim promptly with the appropriate provider is essential. Always communicate your claim details clearly and provide all requested evidence to expedite the process.

When to Contact a Higher Authority

While most flight cancellation issues can be resolved directly with the airline, there are times when you may need to escalate your concerns. If you have exhausted all avenues of communication with the airline, or if the airline is not upholding its obligations according to regulations or its own policies, seeking external assistance becomes necessary. Knowing when and how to involve a higher authority ensures that your rights are protected and that you receive fair treatment.

Escalation is a structured process that typically involves specific bodies or agencies designed to handle consumer disputes in the travel industry. Understanding these avenues can empower you to seek a resolution when direct negotiation fails. This step is reserved for situations where the airline's response is inadequate or in violation of established rules.

Filing Complaints with Regulatory Bodies

Depending on your departure, arrival, or transit location, different regulatory bodies exist to handle passenger complaints. In the United States, the Department of Transportation (DOT) is the primary agency for air travel consumer protection. You can file a complaint online through their website if you believe an airline has violated consumer protection regulations. The DOT can investigate and take enforcement actions against airlines.

In the European Union, each member state has a National Enforcement Body (NEB) responsible for enforcing Regulation (EC) No 261/2004. If your flight was within the EU, departed from an EU airport, or arrived in the EU on an EU-registered airline, you can file a complaint with the NEB of the relevant country. These bodies can mediate disputes and ensure airlines comply with passenger rights laws.

Utilizing Travel Insurance Claims

If your travel insurance policy covers trip cancellation or interruption, and the airline's resolution is unsatisfactory, your insurance provider can be a crucial ally. File a claim with your insurance company, providing all the documentation you have gathered. The insurance company will assess your claim based on your policy and may reimburse you for expenses or compensation that the airline failed to provide.

Ensure you understand the claim submission process and deadlines for your travel insurance. Promptly reporting the incident and submitting all required paperwork will help expedite the claim. If your insurance claim is denied and you believe it's unwarranted, you may need to seek further advice on disputing the insurance company's decision.

Seeking Legal Counsel or Arbitration

For complex cases involving significant financial loss or damages, or when all other avenues have failed, seeking legal advice may be an option. An attorney specializing in travel law can assess your situation and advise on the best course of action, which might include pursuing legal action against the airline. Arbitration is another alternative dispute resolution method that can be less formal and costly than court proceedings.

While legal action is usually a last resort due to its expense and time commitment, it can be effective for significant claims. Always weigh the potential costs and benefits before deciding to pursue legal avenues. For most standard flight cancellation issues, regulatory complaints or insurance claims are usually sufficient.

FAQs: Common Questions About Post-Boarding Flight Cancellations

Navigating the aftermath of a flight cancellation, especially after boarding, can bring up many questions. Passengers often seek clarification on their rights, the process of rebooking, and what compensation they might be due. This section addresses some of the most frequently asked questions to provide clear, concise answers and help you understand your situation better.

Can I get a refund if my flight is cancelled after boarding?

Yes, if an airline cancels your flight after boarding, you are generally entitled to a refund for the unused portion of your ticket if you choose not to accept alternative transportation. Airlines must offer this refund promptly, usually within seven days for cash purchases, or according to the original payment method for credit card purchases.

What if the airline offers me a voucher instead of a refund?

While airlines may offer vouchers as compensation, you are typically entitled to a cash refund if you prefer it. Regulations in many regions, like the U.S. and EU, stipulate that passengers have the right to choose between rebooking or a refund. Do not feel pressured to accept a voucher if a refund is your preference.

Do I get compensation for a flight cancelled after boarding?

Compensation beyond a refund or rebooking often depends on the reason for the cancellation and the applicable regulations (e.g., EU's EC 261/2004). If the cancellation is due to 'extraordinary circumstances' outside the airline's control, compensation may not be required. However, for cancellations within the airline's control, additional compensation may be due, particularly under EU law.

What is considered 'care' from the airline during a cancellation?

Airline 'care' typically includes reasonable meals and refreshments, two free telephone calls, and accommodation if an overnight stay is necessary due to the cancellation. Transportation between the airport and the accommodation should also be provided. The extent of care may vary based on the flight's length and the time of day.

How soon do I need to claim my rebooked flight or refund?

While immediate action is best, there isn't a strict universal deadline for claiming your rebooked flight or refund. However, delays in your claim can complicate matters. It is advisable to address rebooking at the airport if possible, or contact the airline as soon as you are able. Refund requests should be made promptly, as airlines often have internal timelines for processing them.

Can I cancel my flight myself after boarding if I change my mind?

Generally, once boarding is complete and the aircraft doors are closed, it is extremely difficult and usually not permitted to deplane and cancel your flight if you simply change your mind. Such requests are typically handled before the final boarding call. If there's a genuine emergency, you must communicate this immediately to the flight crew, and their decision will be based on safety and operational feasibility.

What happens if my connecting flight is cancelled after boarding?

If your initial flight is cancelled after boarding, and you have a connecting flight booked on the same ticket, the airline is responsible for rebooking you on the next available flight that connects to your final destination. If the cancellation causes you to miss a separately booked flight, you would need to deal with that second airline and potentially your travel insurance.