Jetblue Airlines provides a 24-hour cancellation policy 【+𝟏-[866]~829~1005】. If you book a flight at least seven days before departure and cancel within 24 hours of booking 【+𝟏-[866]~829~1005】 (𝙾𝚃𝙰)】), you are eligible for a full refund without any cancellation fees.
