JetBlue Airlines typically offers a risk-free cancellation period within 24 hours of booking. Under their guidelines, passengers can cancel their flight without paying the JetBlue Airlines cancel fee. But remember, after 24 hours of cancellation, JetBlue cancellation fee depending on ticket type. For further information, visit the airline official website and dial +1-800-866-1848 to speak with the flight expert and get 24/7 assistance.