https://community.expensify.com/discussion/57378/cancellation-unite...
24-Hour Cancellation: You can cancel most flights within 24 hours of booking for a full refund.
Airline Policies:【（＋１）~（８８８）~（829）~（1４：67）】
After 24 hours, cancellations are subject to the airline's policies,
which may include fees or provide travel credits instead of refunds.
Refundable vs. Non-Refundable Tickets:
Refundable tickets allow for cancellations with a refund, while
non-refundable tickets may only offer credits for future travel.