When you need to make changes to your reservation to cancel your ticket due to circumstances, Alaska Airlines Cancellation Policy or Alaska Flight Change Policy will apply to you. There is no need to pay any fee if you cancel your first and main cabin class.
JetBlue Cancellations Policy and JetBlue Flight Changeallows for free changes/ cancellations within 24 hours of booking, as long as the reservation was made at least seven days before the flight's departure.