Originally Posted by
LondonElite
I think the OP means fly LAX-YYZ on AA then connect to YYZ-LHR.
One hour is really tight, but if it is in one PNR and it lets you do it (I think this falls within the min connecting times) then you are (technically) fine. If your plane is late, be prepared to be bumped to the next YYZ-LHR BA flight (which may be in the back of an old 744, you didn't post what day you were flying so the 787 may be the last out of the day).
I've never tried this routing with BA, but I have flown SFO-YYZ-LHR with AC on several occasions, each with around this sort of connection time. I've never even got close to missing the connection (despite being dumped at the end of the terminal once with the moving walkways out-of-action as usual). The passport control at YYZ for US arrivals-International departures never seems to have more than a minute's wait, and the AC lounges and gates - at least - are then very close by.
I'm assuming that the AA/BA transit will be similar, but no doubt there are others on here with far greater experience than me who will provide reassuring words
