Yes, Korean Air SKYPASS miles do expire, but they have one of the more generous lifespans in the airline industry. Miles earned on or after July 1, 2008, remain valid for 10 years from the date they were earned. In 2026, this means that any miles you earned in early 2016 would be nearing their expiration date. Unlike some Western airlines where any account activity (like buying a snack or a small amount of miles) can "reset" the clock for your entire balance, Korean Air uses a strict "fixed-term" expiration. This means each individual mile has its own 10-year countdown based on when it was credited to your account. Once a mile expires, it is permanently forfeited and cannot be reinstated. To avoid losing value, Korean Air members are encouraged to use their miles for award tickets, seat upgrades, or through the "Cash and Miles" payment option, which allows you to use miles to cover a portion of a ticket's cost as long as you have at least 500 miles in your account.