http://www.lbeh.org/ (let's bring 'em home)
This was set up to help enlisted soldiers that would otherwise not have the means to spend the holidays with their families. Money or Frequent Flier Miles are accepted. Every dollar donated is used for tickets, all administration is done by volunteers. Please goto their website to see the ways you can help.
If you have any questions, visit their website or ask them at the below link. I've donated to this cause for over 4 years now.
http://forums.policeposers.com/index.php/topic,6.0.html