Last updated: 3 August 2026
It depends entirely on the program. Delta, United, Southwest, JetBlue, and Alaska have all eliminated mileage expiration for inactivity — your miles stay in the account indefinitely regardless of activity. American Airlines is the notable exception among major U.S. carriers: AAdvantage miles expire after 24 months without qualifying earning or redemption activity, though members under 21 and primary holders of an AAdvantage co-branded credit card are exempt from that rule.
Airline mileage expiration is one of the least standardized corners of travel, and the confusion isn’t accidental — policies get revised often enough that outdated advice circulates for years after a program actually changes its rules. The safest approach is checking your specific program’s current terms rather than relying on what used to be true, since more than one major carrier has reversed course on this exact question in the past few years.
Quick Facts
- No-expiration programs: Delta SkyMiles, United MileagePlus, Southwest Rapid Rewards, JetBlue TrueBlue, and Alaska Mileage Plan (now transitioning to Atmos Rewards) don’t expire miles for inactivity
- American Airlines AAdvantage: Miles expire after 24 months without qualifying activity — earning or redeeming resets the clock for another 24 months
- AAdvantage exemptions: Members under 21 aren’t subject to the 24-month rule; primary holders of an AAdvantage co-branded credit card are exempt as long as the card account stays open
- Credit card transferable points: Chase Ultimate Rewards, Amex Membership Rewards, and Capital One Miles don’t expire from inactivity while the account is open, but are typically forfeited if you close all cards tied to that program
- If an airline shuts down: Miles are typically lost with no transfer option — this happened to Spirit’s Free Spirit members when the airline ceased operations in 2026
- Reactivation: Expired AAdvantage miles can sometimes be reactivated for a fee within a set window after expiration, rather than being permanently lost immediately
Why This Varies So Much by Airline
There’s no regulatory requirement pushing airlines toward either policy — mileage expiration is entirely a business decision each program makes independently, which is exactly why the landscape looks so inconsistent. Several major U.S. carriers eliminated expiration outright as a competitive differentiator, betting that removing a source of customer frustration was worth more than the accounting benefit of periodically clearing dormant balances. American has kept an inactivity-based policy, though it has become more generous over time — extending from an original 18-month window to the current 24 months.
American’s Policy, Specifically
Per American’s own AAdvantage terms, qualifying activity — earning or redeeming miles on American or with an AAdvantage partner — extends the expiration date of your entire account balance by 24 months from the date of that activity. This means the clock resets across your whole balance with any single qualifying transaction, not just the miles from that specific transaction. Two groups are exempt from the rule entirely: members under 21 (though the 24-month clock begins applying once they turn 21), and the primary holder of an AAdvantage co-branded credit card, for as long as that card account remains open. If your miles do expire, American offers a reactivation option for a fee within a limited window afterward, rather than the balance being unrecoverable the moment it lapses.
What Counts as “Qualifying Activity”
For programs that still track inactivity, the definition of qualifying activity is usually broader than just flying. It commonly includes earning miles through a co-branded credit card purchase, hotel or car rental partner transactions, shopping portal purchases, dining programs, or redeeming miles for any award — not exclusively taking a flight. This matters practically: a small, routine transaction through a shopping or dining partner can be enough to reset an expiration clock, without needing to book a trip specifically to keep a dormant account alive.
Credit Card Points Are a Different System
It’s worth separating airline miles from transferable credit card points, since they follow different rules. Points held directly in programs like Chase Ultimate Rewards, Amex Membership Rewards, or Capital One Miles generally don’t expire from inactivity as long as the associated card account stays open — but closing every card tied to that program typically forfeits the points, or triggers a limited window to redeem or transfer them. Once you transfer those points into an airline’s mileage program, they then follow that airline’s own expiration rules rather than the credit card issuer’s.
The Risk No Policy Fully Protects Against
Even a program with no inactivity-based expiration doesn’t protect your miles if the airline itself stops operating. When an airline ceases business, loyalty program balances are typically lost entirely, usually with no transfer option to another carrier — a risk that isn’t about your account activity at all, and one that “miles don’t expire” policies don’t address. This is part of why frequent-flyer guidance generally leans toward using miles at reasonable intervals rather than stockpiling large balances indefinitely, regardless of what a given program’s expiration policy technically allows.
Conclusion
Whether your airline miles expire comes down entirely to which program you’re in, not a general industry standard — Delta, United, Southwest, JetBlue, and Alaska have all dropped inactivity-based expiration, while American Airlines maintains a 24-month rule with specific exemptions for younger members and co-branded cardholders. Because policies do change — American itself has revised this rule more than once — checking your specific program’s current terms is worth the few minutes it takes, rather than relying on what the policy used to be.
FAQ
Do Delta SkyMiles expire?
No. Delta SkyMiles do not expire due to account inactivity, regardless of how long the account sits dormant.
Do American Airlines AAdvantage miles expire?
Yes. AAdvantage miles expire after 24 months without qualifying earning or redemption activity. Any qualifying activity resets the expiration date for the full account balance another 24 months out. Members under 21 and primary AAdvantage co-branded credit card holders are exempt.
What counts as qualifying activity to keep miles from expiring?
Typically more than just flying — earning miles through a co-branded credit card, hotel or car rental partners, shopping or dining programs, or redeeming miles for any award generally all qualify, depending on the specific program’s rules.
Can I get my miles back if they expire?
Sometimes. American Airlines, for example, allows reactivation of expired AAdvantage miles for a fee within a limited period after expiration, rather than making them permanently unrecoverable the moment the balance lapses.
What happens to my miles if an airline shuts down?
They’re typically lost entirely, with no transfer option to another program — this occurred with Spirit Airlines’ Free Spirit members when the airline ceased operations in 2026. This risk applies regardless of whether the program had an inactivity-based expiration policy.
Mileage expiration connects directly to broader loyalty program strategy — see Best Airline Alliances Explained and KrisFlyer vs Flying Blue for related Miles & Points topics.