Generally the best time to book Seattle to Washington D.C. flights is two months in advance. And the cheapest days to fly are Tuesdays, Wednesdays, and Saturdays. Sunday is the most expensive.
There are 42 direct flights from Seattle to Washington D.C..
United Airlines provides 50 of the non-stop flights between Seattle and Washington D.C..
|Airlines flying this route:||Austrian Airlines Delta Air Lines Copa Airlines United Airlines South African Airways Ethiopian Airlines Alaska Airlines Avianca Southwest Airlines Sas|
|Airports in Seattle:||Seattle-Tacoma International Airport King County (Boeing Field) International Airport|
|Airports in Washington D.C.:||Washington Dulles International Airport Ronald Reagan Washington National Airport|
|Average duration of direct flights:||4h55m|