Originally Posted by
RichardInSF
All I know is that in business class, LHR-SFO is noticeably more expensive than BRU-SFO + Eurostar ticket + local ticket from Gare du Midi to the airport.
So it should be. LHR-SFO is a choice of 5 non-stops on airlines with fully lie flat seats accomplished in 11 hours of travelling. London by Eurostar to BRU-SFO is, at best, three segments with non lie flat components and will take at least 5 hours longer - probably eight hours longer. It will be an exhausting day's travelling rather than a comfortable one and you will lose a productive morning in London or a productive afternoon in SF. IMHO it would be better yo go in Y on the non-stop - less tiring and stressful and the money saved will purchase an excellent lunch at LHR.