In 2026, the rules for 24-hour cancellation have become much more passenger-friendly, especially following new global and domestic aviation regulations. In the United States, Department of Transportation (DOT) rules still require most airlines to allow you to cancel a booking within 24 hours for a full refund, provided the flight was booked at least seven days before departure. However, as of March 2026, the Directorate General of Civil Aviation (DGCA) in India has implemented even stricter rules, mandating a 48-hour free cancellation and amendment window for both domestic and international tickets, during which airlines are barred from charging any cancellation or processing fees. If you cancel outside of these regulatory windows, you will almost certainly be charged a fee ranging from $50 to $200, or you may receive only a partial credit. It is essential to note that these "free" windows typically only apply if you book directly through the airline; third-party sites like Expedia or Booking.com often have their own non-refundable service fees that apply the moment you click "purchase," even if the airline itself allows the ticket to be voided.