You have 2 ways of doing this by the T. Both of these are easy and you can do them easily with luggage. (The T Route Planner is frequently on drugs.)1. Hank s route (Logan Shuttle from your terminal to the Blue Line, Blue Line Inbound to State, change for the Orange Line Inbound to Back Bay. Get out, cross the street, you are at the Marriott Copley. 2. Silver Line Bus from your terminal to South Station, get on the Red Line Inbound to Downtown Crossing, change to Orange Line Outbound, get off at Back Bay. I prefer the Silver Line route as there is less walking (Blue Line you have to cross over to the other side of the tracks which is 2 escalators and an aerial walkway, and there are escalators at Downtown Crossing and not at State). It s also marginally cleaner. But either way is great.Bowdoin is the last stop on the Blue Line and exists primarily to turn the trains around and for office workers at the State House. It s feet away from the Government Center stop. NO ONE else uses it.
There are shuttles that will take you from Logan International Airport to various hotels, including the Marriott. Check out the Marriott Copley website to see what kind of shuttle service they offer.
No planner could possibly tell you to walk from the airport to Maverick!!! You must have entered or interpreted something incorrectly. Your own interpretation of the subway map is correct. You take the free bus shuttle from your terminal to Airport Blue Line Station. Blue Line to Orange Line; Orange Line to Back Bay Station. Exit Back Bay by the main front doors. Look rightward. The Marriott is practically across the street.I am not sure there are any FREE shuttles from the Back Bay Mariott to the airport - I never have seen any.