Thanks ralfkrippner and GUWonder, for your replies. Yes, I'm coming from the U.S. If I can't fly all the way on AAdvantage miles, I would at least like to use them to get to Europe and then perhaps do one of the 2 alternatives I listed, paying for either a short haul flight or train ticket, those carriers wouldn't matter. I would like some input on which alternate city is best to fly into and then connect to Copenhagen by either option.
THANKS!