If you booked it on your own, you will have to contact the airline you booked with. If you used a travel agent, they may be able to cancel it for you.. . However, there is a good chance your ticket is non-refundable. Meaning, if you completely cancel your ticket, you don't get anything back. These tickets are lower in price and usually what is sold with most online sites. If that is what you have, you won't likely get a refund. If you chage dates, you will have to pay a fee. . . If you have travel protection, you should also call them. Depending on why you need to cancel, you may be able to get a refund from the insurance company.