How long do AAdvantage miles last before they expire?

AAdvantage miles do not have a strict expiration policy as long as there is some account activity within a specified time frame. Specifically, if a member does not engage in any earning or redeeming activity in their AAdvantage account for a period of twenty-four months, the miles will expire. This means that to keep the miles active, a member should earn or redeem miles at least once every two years. Engaging in various activities can help maintain the account status. For example, members may earn miles through flights with American Airlines or its airline partners, using co-branded credit cards for purchases, or even shopping with participating retail partners. It is important to monitor one's AAdvantage account regularly and consider any planned travel or activities that could contribute to earning or redeeming miles to ensure they do not lapse. Members can check their account status and view the activity history directly on the American Airlines website. If one is uncertain about their account status, looking up their miles balance can be beneficial as well.