I had more than 75K expired since I was not aware of the cut in for time to expiration from 36 months to 18 months.

They have different requirements based on the number of expired miles and flight can be AA, BA or Iberia, japan airlines. But the 750 base miles min per flight seem to have been discontinued.

Not sure the extra 6K or so miles over 75K is worth extra 3K partner miles and 1 RT which is minimum 100$.

Here are the terms:
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You have 6 months from your registration date to complete the requirements. 7 – 12 days after your account shows you’ve completed the requirements, we’ll send you a confirmation email stating that the applicable expired miles have been restored in your account.

Once you’ve registered for a Re-engagement Challenge with AAdvantage Customer Service and paid the $30 non-refundable registration charge, here’s how to restore all/part of your expired miles (you choose!):

1. Subscribe to the AAdvantage eSummary™ and AAdvantage Promotions email and remain opted-in to these two subscriptions for the duration of your Re-engagement Challenge Good news! We already signed you up during our conversation. These subscriptions not only share how to earn miles but also give you a monthly reminder of your current mileage expiration date.

2. Complete the following mileage earning activity within six months of your registration to restore the desired amount of miles:

Up to 50,000 Expired Miles
o Earn 5,000 partner base miles* OR
o Earn miles for 1 round trip flight**

50,001-75,000 Expired Miles
1. Earn 7,000 partner base miles* AND
2. Earn miles for 1 round trip flight**

75,001 Expired Miles or More
1. Earn 10,000 partner base miles* AND
2. Earn miles for 2 round trip flights**


Only miles that expired on or after December 31, 2002 in a current member’s AAdvantage account are eligible to be restored.

* Partner Mileage Requirement: Any AAdvantage partner or collection of partners may be used to earn the total required number of miles in your AAdvantage account. Visit www.aa.com/earn to see a list of AAdvantage partners. Any miles received from transactions through the buyAAmiles®, giftAAmiles®, shareAAmiles® and reactivateAAmilesSM programs, as well as bonus miles received through customer service bonuses or partner bonus offers, do not count toward this requirement.

** Flight Requirement: Purchase a ticket and fly round trip on American Airlines, British Airways, Iberia, or Japan Airlines flight numbers (codeshares marketed by these carriers but operated by others are also eligible), earning miles in your AAdvantage account. You may mix outbound and return carriers