Don't know if this is a good deal or not but thought I would post anyways...

BWI's $9 a day Express for Less parking sale is now available through
October 31, 2007! Print your coupon and present it to the exit cashier.


http://bwiexpressserviceparking.com/en/index

I just used a $6.40 online coupon for Airport Fastpark Blue lot and the service was great.

We've found PreFlight to be excellent; it offers a 6.90 coupon:

http://www.preflightparking.com/BWI.aspx

We've found PreFlight to be excellent; it offers a 6.90 coupon:

http://www.preflightparking.com/BWI.aspx

I use them as well. They have a great frequent parking program.