Trying to find (2) first class awards from Bos to LHR to CGD. Or the last leg could be a separate purchase. When I search AA (have 300K miles) the only options I get are BA flights with 125K round trip plus $1200 in taxes and fees per person. When I search Delta, (have 400K Amex miles for transfer) I can find Virgin Atlantic flights for about the same miles 125K to LHR and 150K to continue to CDG. And the taxes are $315 each to LHR and with a continuation to CDG the taxes go down to only $248... So my questions are why are the taxes and fees different between BA and Virgin? Why would it be lower to continue on from LHR to CDG? I'm leaning towards Virgin flights any insight into Virgin upper class?