U.S. DOT Refund Rules (Reference)

Last verified: 2026-04-27

This page is a neutral reference summary of core U.S. DOT refund, schedule change, tarmac delay, and baggage delay timing rules.

1. Refunds for cancellations

When an airline cancels a flight and the passenger declines the offered alternative, a refund is required.

2. Significant delay / change

Published DOT reference thresholds commonly cited are:

  • 3 hours for domestic itineraries
  • 6 hours for international itineraries

Examples listed in DOT guidance include:

  • Schedule shift
  • Airport change
  • Added connections
  • Downgrade

3. Tarmac delay rules

  • 3-hour limit for domestic flights
  • 4-hour limit for international flights
  • Exceptions include safety, security, and air traffic control constraints.

4. Baggage delay refunds

  • 12 hours for domestic itineraries
  • 15 hours for international itineraries under 12 hours in length
  • 30 hours for international itineraries of 12 hours or more
International trip prep

Do you need a travel eSIM before you fly?

For international trips, an eSIM is most useful when you need data immediately after landing, want to avoid airport SIM counters, or do not trust your home carrier's roaming price.

Check the eSIM decision guide

5. Sources