JetBlue cancellation policy allows travellers to cancel their flight within 24 hours of booking for a full refund, provided that the booking was made at least seven days prior to the scheduled departure date. If the booking was made within seven days of departure, the customer may cancel their reservation within 24 hours of booking for a full refund if the scheduled departure date is at least seven days from the date of booking. Any changes or cancellations made after the 24-hour window will be subject to JetBlue's standard cancellation policy, which may involve fees or restrictions. jetblue 24 hour cancellation policy is designed to give customers more flexibility when booking their flights.