Orbitz allows you to give them multipole airlines FF numbers, after you log in it's under my stuff. If you do that then you will get the miles automaticailly.
If for some reason you don't want to do that I would call the airlines ahead of time and ask to have them enter your FF number, anything you can do before you get to the counter is better then taking up time there, especially if you are in front of me.
[This message has been edited by cordelli (edited 07-10-2002).]