What is Expedia's cancellation policy?
This policy states that if you cancel your flight within 24 hours(USA) or (OTA) of booking and the flight is at least seven days away, you can receive a full refund.
Expedia cancellation policy includes a "24-Hours Free Cancellation" which allows you to cancel most bookings within 24 hours of booking without facing a penalty, provided the check-in date is at least 7 days away. This applies to most hotel reservations, flights, and car rentals.