What is a flight diversion?

What counts as a diversion, and why do flights divert?

A diversion is an operational decision to land somewhere other than the ticketed destination while the flight is under way. It covers a return to the departure airport shortly after take-off, a stop at an airport along the route, and a landing at an alternate airport serving the destination. A stop that was always planned — a scheduled technical or refuelling stop built into the routing — is not a diversion, because nothing went off plan.

Diverting is a safety and capacity decision, and the common causes are ordinary ones: weather that closes the destination airport or cuts its capacity below what the flight needs, a runway or airport closure, a medical emergency on board, a mechanical indication the crew want inspected on the ground, a security or disruptive-passenger event, or a crew duty limit that expires before the destination can be reached.

The experience afterwards varies with where the aircraft ends up. A diversion to an airport where the airline runs its own base may end with a spare aircraft, a gate and staff on hand; a diversion to an airport where the carrier has no operation may mean a coach, a wait, or an overnight stop. What does not change is that the carrier is answering commercial questions — re-booking, refunds, care — after the safety decision has been made, and it answers them under the conditions attached to the ticket.

Whose contract of carriage applies when a flight is diverted?

Conditions of carriage attach to the operating carrier rather than to the website where the ticket was bought. British Airways states on its legal page that the General Conditions of Carriage applicable to flights booked on ba.com depend on the operator of the flight. [4] For flights operated by British Airways Plc, the British Airways General Conditions of Carriage apply. [4] The same page states that the British Airways General Conditions of Carriage apply to flights operated by one of its codeshare partners. [4]

United Airlines approaches the point from the award side. Its MileagePlus rules state that MileagePlus award tickets may be subject to the taxes, fees, tariffs, Contract of Carriage, ticket terms and re-accommodation policies of the carrier on which travel is scheduled. [7] For a diverted award itinerary, the re-accommodation policy that matters is therefore the one belonging to the carrier operating the flight.

United's rules also attach a specific validity condition to award tickets: awards for travel are valid only to destinations served both at the time of the issuance of the award ticket and at the time of departure, and neither United nor its partners are liable for schedule changes that result in the cancellation of service to a destination. [7] That condition matters where a destination loses service around the time of travel, because under United's rules the award is valid only to destinations served at both points. [7]

What happens after a diversion: onward transport, refunds and overnight care

Once the aircraft is on the ground, three questions usually surface: how the passenger reaches the ticketed destination, whether any money comes back, and who looks after people who cannot move on that day. None of the three is answered by the word "diversion". Each sits under the contract of carriage for the ticket and under whatever passenger-rights rules cover the journey.

American Airlines publishes its conditions of carriage on aa.com alongside a customer service plan and a tarmac delay contingency plan. [3] Documents of that kind are where a carrier records its own commitments, and they are read together with the law that applies to the itinerary.

Onward transport is where the contract bites hardest. For MileagePlus award tickets, United's rules point to the re-accommodation policies of the carrier on which travel is scheduled [7], and British Airways ties the applicable conditions of carriage to the operator of the flight [4]. The practical rule of thumb follows from those two statements: find the operating carrier's conditions first. If the diversion also causes a missed connection, the steps are set out in the missed connection action plan.

Overnight care sits at the junction of the contract and local rules, because a diversion can put an aircraft into a country or region it never intended to serve. Border, customs and airport rules apply at the diversion point, and an airport that was never meant to handle the flight may have limited staff, hotels or transport — which is why care decisions are usually taken on the day rather than in advance.

Exceptions and limits

• A diversion is not a cancellation. Cancellation is a separate event with its own rules; United's MileagePlus rules, for example, state that neither mileage credit nor Premier Qualifying Credits are awarded for flight cancellations. [7] Those cancellation rules are not the starting point for a flight that landed somewhere else and then continued.
• No automatic payment. Re-routing, a refund, meals or a hotel depend on the contract of carriage that governs the ticket and on the passenger-rights rules that apply to the journey. A diversion on its own establishes none of them.
• Codeshare itineraries. British Airways states that its General Conditions of Carriage apply to flights it operates and to flights operated by one of its codeshare partners [4], while United's MileagePlus rules make award tickets subject to the contract of carriage of the carrier on which travel is scheduled [7]. Read each statement on the carrier's own page before applying it to a particular ticket.
• Award validity. United's MileagePlus rules state that awards for travel are valid only to destinations served both at issuance and at departure, so a diversion that coincides with a destination losing service runs into a rule about the award itself. [7]
• Local rules at the diversion point. Because the aircraft has landed somewhere other than the ticketed destination, the border, customs and airport rules of that place apply, and they are not the rules of the intended destination.

Frequently asked questions

Does a flight diversion count as a cancellation?

No. A diversion means the aircraft landed at a point other than the ticketed destination, so the flight itself still operated. United's MileagePlus rules deal with the separate case of cancellations when they state that neither mileage credit nor Premier Qualifying Credits are awarded for them. [7]

Whose conditions of carriage apply if my flight is operated by another airline?

British Airways states that the General Conditions of Carriage applicable to flights booked on ba.com depend on the operator of the flight. [4] United's MileagePlus rules make award tickets subject to the contract of carriage and re-accommodation policies of the carrier on which travel is scheduled. [7]

Am I entitled to a hotel or a refund after a diversion?

That depends on the contract of carriage that governs the ticket and on any passenger-rights rules that cover the journey; the diversion alone does not settle it. The place to start is the operating carrier's conditions of carriage — American Airlines, for instance, publishes its conditions of carriage together with a customer service plan and a tarmac delay contingency plan. [3]

Does a diversion affect my award ticket's validity?

United's MileagePlus rules state that awards for travel are valid only to destinations served both when the award ticket is issued and at departure, and that neither United nor its partners are liable for schedule changes that result in the cancellation of service to a destination. [7]

Related pages

Terms: airline contract of carriage, irregular operations, involuntary change, duty of care for flight disruption. Guide: missed connection action plan. Index: frequent flyer glossary.

Sources

Sources checked on 18 October 2026. The conditions of carriage of carriers other than American Airlines, British Airways and United Airlines are not covered here, and neither are the passenger-rights rules of individual countries.

1. American Airlines conditions of carriage, customer service plan and tarmac delay contingency plan, checked 18 October 2026
2. British Airways General Conditions of Carriage, checked 18 October 2026
3. United Airlines MileagePlus program rules, checked 18 October 2026