You can cancel your flight anytime, with or without Expedia’s Cancel for Any Reason product. 2. You can cancel on Expedia up to 24 hours before the first leg of your trip to get your refund of the total flight booking, including seats and bags if any were added at the time of booking.
https://en.community.sonos.com/ask-a-question-228987/faq-can-you-cancel-an-expedia-flight-without-penalty-6909579
