Any problem with sighning up with UAL and USAirways FF programs (for example)?
 

If I were to sighnup for FF at twodiffrent airlines that are partnerd, for example UAL & USairways. I want though all the milege to go onto one account even if i fly with the other airline, normally this would not be aprolem, but if i sign up for bothff prorgams, will they still allow me to do it
Also, is there any down sides for being a member of multiple FF programs (if you are not planning on flying on them)

thankyou

1. No problem signing up for partner airline's programs and putting all the miles in one or the other. It seems more people fly US and put their miles into their UA account than vice versa.

2. No problem with being a member of multiple programs. Sometimes there are new member promotions, which you can't take part in if you are already joined. I'd hold off on joining until you are going to earn miles on any particular airline. If you do earn miles on an airline and you don't fly them often, keep track on how long you don't have any activity in that account. Many airlines will delete the miles if there is no activity of any sort in a certain period of time.