Located off I-195, this is the best bet for short term needs and the closest to the terminal, allowing you to walk into the terminal yourself. As of October 2010, prices are $2 for the first two half hours and after that $4 until the sixth hour, maxing out at $22 per day.
Daily parking costs $3 for the first hour, $3 for the second and $2 for each additional hour, with a maximum of $12 per day. A shuttle bus will transport you to the terminal. The lot is located at Terminal Road and Scott Drive, one block from MD 170. Take exit 1-A off of I-195 and turn right onto Terminal Road.
A shuttle driver will pick you up at your parking spot and drive you to the terminal. The first hour is $4 and each additional hour is $2 for a maximum of $10 per day. Located across from the Daily Garage at Terminal Road and Scott Drive, it's one block off of MD 170.
Long term parking
Located on Aviation Blvd. between South Camp Meade Road and Andover Road, shuttle buses in the long term lot pick up travelers at designated weather-protected spots and transport them to the airport. While this is the most economical choice at $8 a day, it's also the farthest distance away from the terminal.
Don't worry about cruising around for a parking spot at BWI; with over 25,000 parking spots, you're sure to find a few choices. While some patrons don't mind hopping onto a shuttle, others consider schlepping their kids and luggage an extra burden not worth the effort.