Continental.
We've had to do weird things like book six months in advance or take trips that included changing flights, or weird hours, or only flying on certain days, or flying on parther airlines (Delta and Northwest...those don't show up on the Continental search...had to call and ask about them) etc, but have always found something. Only domestic flights though, no look on international flights.
My mom has USAir, and has been able to get free flights to Seattle and South Carolina (I imagine there's not much competition for that one). I think the USAIR partner is United.
Originally posted by sonickteam4:
what frequent flyer program do you use?