Just wondering how long it takes to get from BWI to downtown using the following two methods. We are thinking about taking a Super Shuttle straight to our hotel, or taking the Marc train to union station and then catching a cab from there to our hotel. Our plane lands at 4:00 on a Monday and we were hoping to maybe catch the 6:00 performance at the Kennedy centre that night. I know its tight to make it either way, but wondering which mode of transport will be quicker. Thanks!!