Can I cancel my Expedia flight without a penalty?

You can cancel your Expedia flight without a penalty if it qualifies under the airline’s cancellation policy or if it’s within the 24-hour risk-free cancellation window. Refundable tickets also allow cancellations without fees. For more information, contact Expedia customer service at 1-888-431-2039.

Source: https://www.bluefinutah.com/forum/general-discussion/can-i-cancel-my-expedia-flight-without-a-penalty