1. Key points
- Refunds are owed in the original form of payment if you reject the alternative.
- A significant change includes a domestic flight departing 3+ hours early or arriving 3+ hours late (6+ hours internationally), a different airport, more connections or a downgrade.
- Compensation for delays beyond refunds depends on each airline's commitments.
- You can file a complaint with DOT.
2. Airline commitments
Most large U.S. airlines have committed to benefits such as meals or hotels for controllable delays and cancellations; DOT lists them at flightrights.gov. Refunds must be automatic: within 7 business days for credit card purchases and 20 calendar days for other payment methods.