Travelers can redeem airline travel vouchers or certificates when booking tickets online. United Airlines customers with electronic vouchers can redeem them by choosing a flight and entering the voucher number when prompted for a payment method. Depending on the type of voucher, the number is entered under United Payment Types or in the Promotions and Certificates field. Delta Airlines customers go to the company's website and enter the voucher number for redemption.
American Airlines vouchers are redeemable for air travel online or by calling the reservations center.
It is important to read the terms and conditions of the voucher before redemption. Some airline vouchers are only good for travel with that airline and exclude flights operated by partner airlines. Customers can use airline vouchers to purchase air travel, but not other purchases. Vouchers are for one-time use and are not replaceable if lost or stolen. Most airlines do not allow vouchers to be transferred to other travelers.
Vouchers typically have an expiration date, usually one year from the issue date. Airlines may not honor the voucher if it is expired. Most vouchers are in an electronic format, and passengers who receive a paper airline voucher may need to convert the voucher to an electronic format for redemption. With most airlines, vouchers cannot be used for air travel booked at an airport location or through a reservations desk.