I believe AA is the only one that counts every mile earned. All the others are based (to some forumlas) on flight milage.
Originally Posted by
flyer89
Yea that's what I was thinking too, cause some airlines are required strictly BIS. AA is the only one, to my knowledge, combines everything miles from credit cards, etc to million miler.
Thanks, I was thinking the same as well. The airlines websites are not too clear on the details.