I am currently in Reston on business. My flight home departs from Dulles at 1:00 tomorrow (Friday). I was thinking of a morning visit to tbe battlefield before heading to the airport. I'm guessing that driving from Reston to Manassas should not be too bad as I will most likely be on the road by 0700. Traffic for the drive back yo the airport is the concern. I know traffic is like the weather, no way to really predict, but what time would you suggest departing the park so that I am back at Dulles by 1100?