If customers do not board in time for their flight, the entire fare will be lost. jetblue cancellation policy will impose cancellation fees based on passenger destinations after 24 hours after purchase, just like other airlines. The amount of a passenger cancellation fee is determined by when and why the tickets are cancelled. Always cancel tickets as soon as possible from the day of purchase to save money on the cancellation charge. Read Also: alaska airlines cancellation | british airways cancellation policy