Plane tickets fall into one of two categories: refundable and nonrefundable. A refundable plane ticket typically allows you to get reimbursed if you have to cancel your trip.

Flying solo? Learn about the rise of single airline ticket costs, why these fares can be higher, and how to avoid paying ...

An airline companion ticket is basically a two-for-one voucher. If you have one, you can book a ticket for yourself and apply the companion certificate to a second ticket on the same trip.