I flew out with Continental to DC from Edinburgh. Quick change of planes in Newark and about a 40 minute flight down to DC. My flight was a one way leg. IIRC it was about £300. I booked it through Trailfinders.
Anyone here got any experience of were to get cheap flights for a family to Washington? Got some friends moving out there and want to visit, never been to be the states before so any advice would be great.