Fly nonstop from Washington DC to Seattle for $217 roundtrip on Delta.
Searching Delta, we found seats departing IAD on Tuesday, February 26, returning from SEA on Tuesday, March 5.
Other dates are available for travel from late February throughout March.
Please note, this is a basic economy fare which includes a carry on and personal item but does not include seat selection. A regular economy fare for these dates will cost you $277 roundtrip.
See our Washington DC IAD fare listings for a complete look at current finds.
Need a room in Seattle? Here's what's available for the above dates on Hotelwatchdog.