Updated June 2010

Below is a list of popular U.S. airlines and and how long you can go without activity on your account before losing your miles. Activity is defined as any miles in or out for any reason; miles earned or miles redeemed.

If you are getting close to your expiration dates, make sure to visit FreeFrequentFlyerMiles.com for earning opportunities or as a last resort, you can always buy miles directly from the airline. I try to make sure I have activity at least 2 months before my expiration dates to allow ample time for posting.

2 Years:
Southwest
Delta

18 Months:
United
Continental
American Airlines
US Airways
Virgin America

1 Year:
JetBlue