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
FB is a natural program to use for trips to France (AF/KLM and DL), but DL doesn't have nearly as many flights from SFO as UA offers. DL has a connection (crossover) with SPG while UA does the same with Marriott. Taking UA and *A partners to France would probably mean connecting in FRA or MUC.
It's hard to see an argument for using/crediting to Virgin America.