Originally Posted by alect
"Across the Atlantic you will have to fly AA otherwise you won't get any miles if flying on BA on AAdv. But otherwise sample some of the other airlines' J - it's one of the joys of RTWs.
Can't you fly BA to Canada and get AAdv. miles? I thought the restriction was just to/from US over the Atlantic.
And, from all I've read, it seems the cheapest xONE fares are now ex CMB.