Originally Posted by Efrem
Parking at an airport parking garage, the only option within walking distance of the terminals, will cost you about USD 240 for that long ($24 per day/$120 per week, after the first day anything over 6 hours counts as a full day). Not a good idea.
Massport has done away with weekly rates at all lots except the economy lot ($96/week), but that lot requires a shuttle bus to and from the terminal.