the option to find your booking by entering your itinerary number. Locate the booking you wish to cancel. Select “Cancel Flight” and follow the instructions....
https://www.nopcommerce.com/en/boards/topic/100098/speaktoagenthow-do-i-speak-to-someone-at-expediaexpediacustomerservice

Expedia allows you to do so for free. Whether you booked a refundable or non-refundable ticket, you are entitled to a full refund. To initiate....
https://www.nopcommerce.com/en/boards/topic/100054/expediarefund-how-do-i-get-100-a-refund-from-expedia

.Expedia allows you to do so for free. Whether you booked a refundable or non-refundable ticket, you are entitled to a full refund. the option....
https://www.nopcommerce.com/en/boards/topic/99996/expediarefundpolicy-can-i-get-a-refund-from-expedia