Originally Posted by McNandez

Both options would be very similar in time. The Blue Line way requires an airport bus to the airport T station, while the Silver Line picks up directly at the terminal. The Silver Line is a 'nice' bus and has luggage racks. It will go directly into South Station where you can change to the Red Line.

I would say take the Silver Line because it is currently free when coming from the airport, and it includes a free transfer to the Red Line. You should be in air conditioned places the entire time, but if you have a lot of luggage, you might find it worthwhile to spend the $30ish on a taxi or UberX.

Enjoy your trip to Boston.

Originally Posted by octr202

If you're looking for the transit option headed towards the TD Garden, the Blue Line might be the easiest option if you're up for a 7-8 minute walk on the other end. Due to the closure of Government Center (Green Line transfer), Bowdoin Station (the downtown end of the Blue Line) is open at all hours now. From Bowdoin Station, Google Maps indicates a 7 minute walk to the HI Express on Friend St. I'd say that's probably conservative, especially if your bags are light. It's about 0.3-0.4 miles.*

The Blue Line isn't free like the Silver Line is at the airport ($2.50 per person ticket, $2.00 if able to get a Charlie Card), but it'll be a pretty quick trip from Airport Station to Bowdoin. You'll have to take the Massport shuttle from the terminal to the Airport Station, but if you take the Silver Line, you'll need to transfer to the Red Line, and then to the Green or Orange to North Station to end up near the HI Express.