delta runs ads saying if you have a gold amex skymiles card your first bag is free. we have that card and when my wife flew from mich to atlanta last week they charged her $23 each way for her bag, even tho she has the card with her ff# on it. when i called delta they said amex has to link it to delta so i had to call amex. their excuse was that i was the owner of the card and she was just an extra user and only the owner gets the free bag. seems pretty petty to me. they did offer to open up an account for my wife. nice of them. guess when we use up our ff miles its the end of that card.