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Do Delta miles expire?
No. Delta SkyMiles do not expire and there is no inactivity clock — Delta's own program rules state miles never expire. The catch is value rather than time: SkyMiles are priced dynamically against cash fares, so a balance held for years quietly buys less as fares and award prices rise.
GuideDo Alaska miles expire?
No. Alaska dropped its 24-month inactivity rule in April 2023, and under the renamed Atmos Rewards program the terms state points have no expiration date and may remain in an account indefinitely. An idle Alaska balance is safe, so the only real risk to it is program devaluation.
GuideDo Amex points expire?
No. American Express states Membership Rewards points have no expiration date, and there is no inactivity rule. They are forfeited in two situations: closing your last Membership Rewards-earning Card loses unredeemed points immediately, and points can also be forfeited for an unpaid billing period.
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