Jetblue cancel flight policy offered by JetBlue is designed to give customers convenience and flexibility. As long as the reservation was made at least seven days in advance of departure, travelers are free to cancel within the first 24 hours of making the reservation without being charged. There are minimal fines associated with cancellations made after this time or within seven days of departure. JetBlue streamlines the procedure by enabling modifications to be made via their committed customer support or online.