Like a lot of people, my United Mileage Plus miles are set to expire at the end of this month. I was looking for a cheap way to generate "account activity" in order to reset the clock, and found out that it is possible to donate Mileage Plus miles to charity. A little googling for "donate frequent flyer miles" led me to discover that many other airlines offer similar programs.
I'm sure many of you already knew this, but I thought I'd post about it in case there are any other a.netters like me who didn't know this. Seems like a great way to help someone else out, and maybe help yourself out by delaying expiration of any remaining miles in your account that you don't donate.
Here are links to donation programs for some airlines:
United (only one charity available online, can donate to others via phone)
1-800-421-0600 - American
AirTran (log in and click "Request Rewards" tab)