Offsite parking at BWI vs. Dulles?

[TheLittleRoo]

We're considering an AT flight from BWI to MCO for $885 / 5 people or an AT flight from IAD to MCO for $1095. We live 5 miles from IAD so our parking cost would actually be taxi fare, or $70 roundtrip.

BWI, on the other hand, would entail 3 hr roundtrip (guessing $50 gas) and 7 days parking. Are there any offsite lots, or ways to park at a hotel lot if we stayed one night there (assuming that saves us money).

I've seldom flown from BWI and I'm just not familar with its parking options. Thanks for any advice!

 

[Tina]

I recall staying and parking for free at a Courtyard at BWI several years ago.

 

[Steakgoddess]

http://www.econoparkexpress.com/ is $6.35 a day plus tax as long as you print off the internet coupon.

Airport Fast Park at BWI is $6.40 a day excluding tax with the internet coupon.

I am pretty sure that parking at BWI is about $8 in the long term lots.