There are several options for transportation from the Boston Airport to downtown or to the cruise terminal. You can take a taxi, limousine, subway, bus, or water shuttle. It's a short trip and you really can't go wrong with any transportation option.
Downtown Boston is about 4 miles from Logan International Airport. Travel time is 15 to 20 minutes. Boston's Black Falcon Cruise Terminal is about 7 miles from the airport. A taxi to the port takes 30 to 45 minutes and costs approximately $15 for two passengers.
Renting a car for your Boston airport transportation is a bad idea. The roads are confusing and snarled with traffic. Parking is scarce. Take a cab or public transportation instead!
How to get to and from Logan can help you find the best way between the airport and your destination.
The Airport Water Shuttle is another option. It operates between Rowes Wharf downtown and the Logan Boat Dock. From the boat dock, free transfer buses serve the terminals.
The MBTA Silver Line connects the airport and the south Boston waterfront. It's a bus rapid transit service, and it's cheap. If you don't have too much luggage, it's a possibility.