When Do United Airlines Miles Expire?

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United Airlines MileagePlus miles never expire as long as your account is open and in good standing.

Previously, United miles expired 18 months after account inactivity, so the current policy is a nice improvement.

However, you should regularly redeem your United miles because airlines regularly devaluing their points.

Comparison of U.S. Airlines' Policies

Below is the mileage expiration policy for every major U.S. airline.

Airlines Expiration Policy
Alaska Airlines Alaska 24 months
American Airlines American 18 months
Delta Air Lines Delta Never
Frontier Frontier 12 Months
Hawaiian Airlines logo Hawaiian Never
JetBlue JetBlue Never
Southwest Airlines Southwest Never
Spirit Airlines Logo Spirit 12 months
United Airlines logo United Never
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