They usually don't list the off site parking, which is ostensibly cheaper.Logan.
Thanks!(But see, this is why there really needs to be a roundup site. Because I actually did stumble upon a cheaper one. http://www.preflightparking.com/BOS.aspx This is very silly, why do they bother competing on price if nobody can compare anyway.
Never been, but Boston has a an airport shuttle and Subway system... why can't you just park somewhere free and take a train/shuttle
https://parksleepfly.com/