Just wondering how difficult the process is... I don't know at this point which airline, will find out tomorrow (but it could be DL, CO, NW, or AA). I have accounts with all three, so I could add the miles to any of them.

The other company that's buying the ticket is either booking directly through the airline or using its own travel agency (Wagonlit, I think)

Can I just call the airline after I get my tix to add my FF number? (I'd really prefer not to ask this other company to do anything FF-related on this ticket just so I can get a few miles)