컨티넨탈의 경우 "아직은" 마일리지 유효기간이 없습니다. 하지만 18개월간 활동이 없으면 구좌 자체가 cancel되는 경우가 있으니 주의하셔야 합니다.

"If no mileage is deposited in your account for 18 consecutive months, your membership may be cancelled, and your miles may be forfeited. To keep your account active, you can earn mileage with a variety of airline, non-travel and shopping partners. Please visit the Earn Miles section of this site for a full list of earnings partners."