I just flew SFO-FRA (UA900) and FRA-CDG yesterday (Wednesday). We landed in Hall B, although the plane landed in a remote airstrip and we had to take a bus to Hall B. The FRA>CDG flew out of Hall A. So first hope that your plane isn't landing with the bus, which of course you can't control, but if it happens, don't get too shocked (it's happened to me the last couple years I've flown on UA900, but I only fly it once a year). It really really sucks though even if not in a rush, especially if FRA is the final destination. More wasted time It offsets that the SFO>FRA flight tends to arrive "earlier" than expected.