In the vast majority of cases, you cannot simply give your plane ticket to someone else. Most airline tickets are non-transferable and tied to the specific name and passport details provided at booking. Due to international security laws and anti-scalping regulations, airlines rarely allow a full name change. If you cannot travel, your best option is usually to cancel the ticket for a travel credit (minus a change fee), which you can sometimes use to book a new flight for another person if the airline's "Travel Bank" rules permit it. Some low-cost carriers (like Ryanair or EasyJet) do allow name transfers for a substantial fee that often exceeds the original ticket price. For major carriers like Delta or United, if you made a small typo, they will fix it for free, but they will not allow a complete change of identity on the reservation.