Cheap United flights Washington (IAD) to Seattle (SEA)

Flights from Washington (IAD) to Seattle (SEA)
Origin airport
Washington Dulles Intl.
Destination airport
Seattle - Tacoma Intl.
Distance
3679 km
Average flight time
2 hours 47 mins

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA)?
Scoring cheap one-way United Airlines flights from IAD to SEA on Expedia is a breeze — just filter by "Price (lowest to highest)." Alternatively, check out our affordable round-trip fares for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to SEA with United Airlines?
Browse for one-way or round-trip flights to Seattle in January or February. You could find a cheap fare with United Airlines during these off-peak times.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA)?
United Airlines operates direct flights from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA), with 7 departures each week. Just apply the "Nonstop" and "Airline" filters while searching on Expedia to find all direct United Airlines flights to SEA.
How long does it take to fly from IAD to SEA with United Airlines?
It takes around 6h 1m to fly nonstop from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA) with United Airlines.
What airports does United Airlines fly into in Seattle?
Seattle - Tacoma Intl. Airport (SEA) is the primary Seattle gateway for United Airlines flights from Washington Dulles Intl. Airport (IAD).
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA)?
You'll likely be seated on a Boeing 737-900 or a Boeing 737-800 when flying United Airlines from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA). However, keep in mind that a different plane may be assigned due to operational demands.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to Seattle - Tacoma Intl. Airport (SEA)?
Changes are generally free within 24 hours of booking, but your airline may charge a fee after that. For further details about altering your flights, go to your "Trips," select your flight and click on "Manage Booking." If you'd like the flexibility to adjust your plans without extra charges, apply the "No cancel fee" or "Changes included" filter when organizing your trip.