ETA; I found for $93 a one way paid flight which I think I will beh take!
Wish I can book on ba, I have so many avios sitting not knowing what to do with them!
Below in the picture you can see this united flight is operated by air Canada! Will I still be able to get a free bag as I'm booking through united while having the mileage Explorer card? And is it like that always when they fly on another carrier you can't choose online your seats unless I go on air Canada's website or call?