https://twor.microsoftcrmportals.com/forums/support-forum/e5d62620-db05-ef11-a73d-6045bd3fd1cb
During the 24-hour Risk-Free Cancellation Period: You can change your flight at no additional cost beyond any price difference.
After the 24-hour Risk-Free Cancellation Period: Only the price difference applies for changes.
Within 24 Hours of Flight Departure: Changes are possible starting from $75 when available.
Note: The policies for the Basic Economy Ticket are more restrictive after the initial 24-hour risk-free period.
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