JetBlue's refund policy depends on the fare type you purchased. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) While the cheapest fare, Blue Basic, has strict cancellation fees, most other fare types can be canceled for a travel credit without an additional fee. 

Refund policy by fare type

• Refundable fares (like Blue Refundable, Mint Refundable): You can cancel these tickets anytime before departure for a full refund to your original form of payment.
• Nonrefundable fares (including Blue, Blue Plus, Blue Extra, and Mint): You can cancel these flights before departure for a travel credit, which is valid for 12 months from the date the ticket was originally issued. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) You will also receive a credit if you change to a less expensive flight.
• Blue Basic fares: Bookings made on or after March 18, 2024, cannot be changed. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) Cancellations are permitted but incur a fee: $100 per person for routes within North America, Central America, and the Caribbean, and $200 for all other routes. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) The remaining balance is issued as a travel credit.