BeFrugal.com, a company headquartered here in Boston, has a calculator on their site that helps with that fly or drive financial analysis. While many of the fields are optional, I recommend that you put in as much information as possible to make sure you get the best answer possible. I ran the tool for a trip from Boston, MA to Washington, DC, and got the recommendation to drive (probably what I’d want to do as long as we had the time to drive).
BeFrugal.com also offers some great deals on travel – including coupons and cash back. I recently got a great deal on a hotel using Travelocity – with 4% back too!
Sign up at BeFrugal.com to get $10 in your account and to check out the Fly or Drive Calculator.