mileage expiration

Mileage expiration refers to the period during which frequent-flyer or rewards program miles remain valid for redemption. Typically, if you do not use or earn more miles within a specified time frame—often one to three years—the miles expire and can no longer be redeemed for flights or other rewards. This policy encourages active account management and usage, though some programs offer ways to extend validity through earning or maintaining account activity. Once miles expire, they are permanently lost, so it's important to keep track of expiration dates to maximize your benefits.