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: 102,617
I have DL lounge access, so that would be the determining factor even if I were (just) a FO, assuming that we're not talking about a basic economy fare.
I'd probably look at frequencies and seat maps too, as well as checking fare class availability on EF to get a better idea about probable loads.