But you would only get the 30K miles if you flew in F exclusively. For instance, if you flew AC, you'd be booked in J (?-Empress?) and only get 25% more for that.

And all of AA's transborder flights are now J instead of F so I wonder if United has done the same. You may have to stay out of Canada on this hypothetical F RTW to get the full miles. Similarly with Europe, I think.

andrew