Urgent Info required on Washington Airports.

Hey there.

We've got a chance at a really cheap flight from Washington Dulles (IAD) to LAX, via Independence Air.

1) Is Dulles OK to get to from the main part of Washington DC for a 7pm flight?

2) Anything I should know otherwise?

(*poing* - 2 weeks to go!!!)

EDIT:Booked!
From Washington-Dulles, VA (IAD) to Los Angeles, CA (LAX)
Wednesday, 28 Sep 05 Flight 850
Depart Washington-Dulles, VA (IAD) at 7:30 pm and arrive in Los Angeles, CA (LAX) at 10:00 pm