I flew Canadian Affair Gatwick to Vancouver. Avoid the one that stops in Edmonton…by that point we just wanted to get there and not sit on the tarmac at Edmonton! It is only the second time I’ve flown and the first time long haul, but I was surprised how cramped it was. We’d booked twin seats in the tail so had a wider aisle to stretch into, it would have been truly miserable in the main cabin. The downside was the seat both ways were in various states of collapse, presumably as everyone sits at an angle to make use of the aisle, so the seat base was wonky.
Finally, Vancouver airport decided that the max luggage weight was less than on the way out, so both our bikes were over by a kg or so. A reasoned discussion and a tense few minutes later (she’d already sent our underweight normal bags off) and she ushered us through when the supervisor turned away.