BlondeBomber-
I'm am only enrolled in three programs: United, US Airways and American. I have claimed rewards UA & American. However, for the past several years I pretty much fly exclusively on UA thanks to the great deals I get out of BWI. I think I took two or three trips on US Air last year. American has very few flights out of BWI. I even put up with the dreaded IAD people movers, parking lots

and United Express to maintain my UA elite status when travelling up and down the east coast.
One of my favorite sports is finding an originating, very low fare flight out of BWI that connects through IAD when the direct flight out of IAD is priced very high. Two extra segments plus, an extra 2000 miles