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Do AAdvantage miles expire?
Yes. American AAdvantage miles expire after 24 months with no earning or redemption activity, and any qualifying activity resets the clock on the full balance. AAdvantage credit-card holders and members under 21 are exempt, so their miles stay alive however long the account sits idle.
GuideDo 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.
ToolWhat are AAdvantage miles worth?
An American AAdvantage mile is typically worth about 1.5 cents — between the two US reference valuations, which disagree here — so 25,000 miles come to roughly $375. Cheap domestic economy lands nearer 1.2 cents and international business around 1.8 cents. The calculator converts any balance into dollars, pounds and euros.
ComparisonAvios vs AAdvantage miles
Avios and AAdvantage miles land close in value — about 1p per Avios against roughly 1.5 cents per mile — so the deciding factor is usually the cash charges, because a British Airways Avios reward adds carrier charges on top of tax. Avios expire after 36 months of inactivity; AAdvantage miles after 24.
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