The last time you cancel a refundable Expediaa flight is before a few-hours of flight departure. Toll-free (+1-833-266-7657///+1-833-266-7657). For cancellations after this period, fees may apply depending on the fare type purchased.
Source: https://oawp.va.gov/forums/general-discussion/ab0842fa-c537-ef11-a296-001dd8015683