Originally Posted by
yyznomad
I can't comment regarding Covid-times out of LHR on BA or AC as I've flown out of there during normal times.
If you are going to fly BA the the BA forum would be best. If AC, likewise in the AC forum.
If you want to follow entry into Canada rules, the Destinations forum | Canada subforum is the best place to go.
If you want to follow general airport procedures to depart from a UK airport, then Destinations forum | UK & Ireland subforum is probably the best place to go.
Of course, you'll need to get all of your COVID papers/documentation/proofs sorted out and ready for entry into Canada... you got all that sorted already (aside from any negative covid test results that you might need shortly before your trip)?
Air Transat is
not Air Canada.
If things go well, then traveling with Air Transat (IATA code TS) will be fine. If things go sideways, then you could be in a situation where you may not be rebooked to another flight for a few days (they only fly LGW-YYZ on Tu/Th/Sa/Su).
Flying with BA gives you many more possible options to fly if LHR-YYZ is severely delayed or cancelled. They will involve connections (and you'd have to make sure that you're allowed to transit through the connecting airport), but at least you'd be on your way.