Hello All-

I am flying IAD-GVA with a most likely stop in FRA. If I do transfer in FRA, I was wondering what the transfer procedures are with regard to lounge access between connecting flights. Do you have to clear customs first like at LHR or is it like connecting to domestic flights in the US or between flights in ZRH where you don't have any passport control area? If flying on United, can I use Arrivals by United? Timing wise, UA is probably better but there is also LH for the transatlantic leg. Yes, I know LH has better service on board but I only want to judge on ease of transfers for now? Lastly, if you had the choice, would you connect in ZRH, MUC, or FRA? Thanks for the help!