A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,404
FWIW, there's been speculation on FT that the DL/AS partnership might be ending soon.
If OP is traveling for business, it could be hard to explain missing connections while trying to fly UA/US through CLT when there are many non stops on the route.