When you need to make changes to your reservation to cancel your ticket due to circumstances, Alaska Airlines Cancellation  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 Cancellation Policy and JetBlue Flight Change  allows 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.
British Airways Cancellation Policy  and British Airways Flight Change Policy  provide you with all the information you need before you cancel or change your travel plans.