Airlines can now decide how long a delay must be before a refund is issued – however, these new rules define “significant” delay standards that trigger refunds. The delays covered would be more than three hours for domestic flights and more than six hours for international flights, the agency said.

This includes tickets purchased directly from airlines, travel agents and third-party sites such as Expedia and Travelocity.

The DOT rules lay out that passengers will be “entitled to a refund if their flight is canceled or significantly changed, and they do not accept alternative transportation or travel credits offered.”