As per the Jetblue Cancellation Policy, In the event that the traveler drops a non-refundable ticket, the flight cancellation expense would be pertinent. The said....
https://www.airmonks.com/cancellation-policy/jetblue-cancellation-policy

Asiana Airlines has its own domestic flight service which provides valuable assistance in booking flight tickets online. Immediately thereafter, when a passenger needs to change....
https://sites.google.com/view/asiana-airlines-reservation/home

Iberia offers its passengers the possibility of canceling a flight without any problem. You can cancel your ticket online and submit the refund request form....
https://www.askmeflight.com/blog/iberia-airlines-cancellation-policy

The process of making online changes to Southwest Airlines is simple and easy. Best of all, if all of the above conditions are met, you....
https://www.askmeflight.com/blog/how-to-change-southwest-airlines-flight