Direct flights from Dulles to Seattle IAD → SEA
Alaska Airlines, Delta Air Lines and United Airlines operate nonstop flights from Dulles (IAD) to Seattle (SEA). The nonstop flight takes around ~4h 38m, covering 2,300 miles (3,702 km). Updated 28 June 2026.
IAD
→
SEA
Round trip
1 adult
Economy
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Alaska Airlines
AS
Delta Air Lines
DL
United Airlines
UA
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Frequently asked questions
Is there a direct flight from Dulles to Seattle?
Yes, Alaska Airlines, Delta Air Lines and 1 more airline operate nonstop flights from Dulles (IAD) to Seattle (SEA).
Which airlines fly direct from Dulles to Seattle?
Alaska Airlines, Delta Air Lines, United Airlines operate nonstop flights from Dulles to Seattle.
How long is the flight from Dulles to Seattle?
The nonstop flight from Dulles to Seattle takes ~4h 38m (approximately 3702 km).