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: 100,372
Some carriers let you see or even pick the booking class when purchasing a ticket on their website. This tends to require advanced/expert search mode. Others show you the fare code just before purchase. You certainly should be able to look at the complete fare rules before purchase, but this isn't obvious on a lot of airline websites.