Short answer: Since October 19, 2026, airlines report ten causes of delay and cancellation in a new category, outside the controllable Air Carrier one. Airline promises of meals and hotels cover controllable disruptions, so travelers will get them for fewer events. Refund rights for cancelled or significantly changed flights stay the same.
A rule from the US Department of Transportation took effect on October 19, 2026. It changes which delays count as the airline's fault, and that decides when a traveler gets a meal or a hotel. Here is what changed and what agencies can tell their travelers and clients.
What changed on October 19?
DOT added a new category to the way airlines report the causes of delays and cancellations. The rule, published in the Federal Register on September 3, 2026, carries out Section 511(b) of the FAA Reauthorization Act of 2024.
Since 2002, large US airlines have reported the cause of every delay of 15 minutes or more each month. Until now there were five causes: Air Carrier, Extreme Weather, National Aviation System, Security and Late Arriving Aircraft. The new rule adds a sixth cause called Section 511(b). Cancellations get a matching code, E. Ten events move out of the Air Carrier category and into the new one.
Which ten events moved?
| Event | Detail in the rule |
|---|---|
| Aircraft cleaning | Needed after the death of a passenger |
| Aircraft damage | From extreme weather, foreign object debris or sabotage |
| Bag or cargo loading | A delay from an outage of a bag system the airline and its contractors don't control |
| Cybersecurity attacks | When the airline complies with the cybersecurity rules that apply |
| Government systems | An unexpected shutdown or failure that affects safe flying |
| Overheated brakes | After a safety incident that used emergency procedures |
| Unscheduled maintenance | Work outside the scheduled program that has to be done before flight, including airworthiness directives |
| Medical emergencies | Through no fault of the airline |
| Unruly passengers | Removal of the passenger |
| Airport closures | From volcanic ash, wind or wind shear |
Why does a reporting code matter to travelers?
Because airline promises follow it. Every large US airline that sells tickets commits in its customer service plan to free amenities for long controllable delays and cancellations. Some also commit to non-cash compensation. DOT tracks those plans on its Airline Cancellation and Delay Dashboard.
Controllable means the Air Carrier category. With ten events moved out of it, DOT's own analysis expects airlines to provide amenities and compensation for fewer delays and cancellations. DOT says the size of that drop is hard to estimate, since it has little data on how often the ten events happen.
Do refunds change?
Refund rights stay as they were. A separate 2024 DOT rule still requires prompt automatic refunds when an airline cancels or significantly changes a flight. Agencies process those refunds the same way as before.
The rule also leaves cash compensation where it stood. In September 2025, DOT withdrew an earlier proposal that would have required cash payments for controllable delays.
What should agencies tell travelers and clients?
- Set expectations before the trip. A meal voucher or a hotel room after a long delay now depends on the cause the airline gives.
- Ask for the cause at the time. When an agent rebooks a disrupted traveler, note the cause the airline states in the booking record. It helps later, when the traveler or the client asks why the airline covered the hotel or declined to.
- Check the airline's plan. Each carrier's commitments sit on DOT's dashboard. Use them when a traveler asks what they're owed.
- Brief corporate travel managers. More overnight delays may land on the company card. Travel managers may want their policy to say who pays for a hotel the airline declines to cover.
Will on-time numbers look different?
Yes. DOT and the Bureau of Transportation Statistics publish Air Carrier delay figures. The media and analysts follow them closely. Crowell and Moring's analysis says those figures may improve as ten causes leave the category.
When you compare airlines in a supplier review, compare like with like. Figures from before October 19 and after it count delays differently.
What comes next?
Air traffic control delays fall under Section 511(a), a separate part of the law. The Bureau of Transportation Statistics plans to address them in a later rulemaking. DOT also put broader requests from the airlines into future rulemakings with public comment.
The short version for your team
Refunds work as before. Meals and hotels after a delay now depend on the cause, so record the cause the airline gives and point travelers to the airline's customer service plan.
Common questions
When did the new DOT delay rule take effect?
October 19, 2026. DOT published the final rule in the Federal Register on September 3, 2026, under Section 511(b) of the FAA Reauthorization Act of 2024.
Does the rule change refunds?
Refund rights stay as they were. A separate 2024 DOT rule still requires prompt automatic refunds when an airline cancels or significantly changes a flight.
Can an airline still offer a meal or a hotel for these ten causes?
Yes. Airlines can still provide them by choice. The rule removes the commitment their customer service plans made for these events.
Does the rule cover air traffic control delays?
Air traffic control delays fall under Section 511(a), a separate part of the law. The Bureau of Transportation Statistics plans to address them in a later rulemaking.
Where can we see each airline's commitments?
On DOT's Airline Cancellation and Delay Dashboard, which lists what each large US airline commits to for controllable delays and cancellations.
Sources
- US Department of Transportation, Final rule: Cause of airline delay and cancellation categories under Section 511(b) (Federal Register, September 3, 2026) Independent
- Crowell & Moring, DOT final rule narrows airline delay and cancellation reporting obligation (September 2026) Secondary
- AeroCorner, New DOT rule cuts airline delay amenity duties (September 2026) Trade press
Checked on October 28, 2026. Rules change, so check the source before you act on a date or an amount.
