One way to possibly use such tickets is to check with the airlines if they are willing to convert the unused ticket to voucher credits or reissue the ticket under a different name. However, some top airlines charge a certain amount to change the names on these tickets.

Using an unused airline ticket typically involves converting the value of the original booking into a Future Flight Credit or a Travel Certificate, depending on the airline's specific policy. If you cancelled a non-refundable flight, the value (minus any applicable change fees) is usually stored under your original confirmation number or linked to your frequent flyer profile. To redeem it, you generally begin a new booking on the airline's website or app; once you reach the payment screen, you can select "Travel Credits" or "Use Certificates" as your payment method. You will then enter your original ticket number or the certificate code. Most credits have an expiration date, often one year from the original date of issue, so it is vital to book and sometimes complete your travel before that deadline. If the new flight is more expensive, you simply pay the difference; if it is cheaper, the remaining balance usually stays in your account for future use. For major carriers like Delta, United, or American, logging into your account will often reveal any available credits automatically, making it easy to apply them to your next trip without needing to call a customer service representative.