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Washington D C to Seattle One-Way Flights (WASA-SEA) in September 2027

Washington, D.C. (Any) → Seattle (SEA)

Washington, D.C. (Any) to Seattle (SEA) in September 2027

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Finding fares for September and October…

Washington, D.C. (Any) to Seattle (SEA) by month

November 2026
December 2026
January 2027
February 2027
March 2027
April 2027
May 2027
June 2027
July 2027
August 2027
September 2027
October 2027

Other Options for This Route

SEA destination

Economy One-way to Seattle (SEA)

Washington, D.C. (Any) to Seattle (SEA) in October

Other Destinations

LAS destination

Economy Roundtrip to Las Vegas (LAS)

Washington, D.C. (Any) to Las Vegas (LAS) in September

AUA destination

Economy Roundtrip to Oranjestad (AUA)

Washington, D.C. (Any) to Oranjestad (AUA) in September

GIG destination

Economy Roundtrip to Rio De Janeiro (GIG)

Washington, D.C. (Any) to Rio De Janeiro (GIG) in September

PUJ destination

Economy Roundtrip to Punta Cana (PUJ)

Washington, D.C. (Any) to Punta Cana (PUJ) in October

ATH destination

Economy Roundtrip to Athens (ATH)

Washington, D.C. (Any) to Athens (ATH) in October

MEM destination

Economy Roundtrip to Memphis (MEM)

Washington, D.C. (Any) to Memphis (MEM) in November

Flights from Other Cities

SEA destination

Economy Roundtrip to Seattle (SEA)

Washington, D.C. (BWI) to Seattle (SEA) in September

SEA destination

Economy Roundtrip to Seattle (SEA)

Charlottetown (YYG) to Seattle (SEA) in September

SEA destination

Economy One-way to Seattle (SEA)

Honolulu (HNL) to Seattle (SEA) in October

SEA destination

Economy Roundtrip to Seattle (SEA)

San Diego (SAN) to Seattle (SEA) in October

SEA destination

Business One-way to Seattle (SEA)

Philadelphia (PHL) to Seattle (SEA) in October

SEA destination

Economy Roundtrip to Seattle (SEA)

Los Angeles (LAX) to Seattle (SEA) in November

Cheap economy Class Flights from Washington, D.C. (Any) to Seattle (SEA) September

Find the best deals on economy class flights. Compare prices for direct flights, one-stop, and multi-stop options.

Why Choose Economy Class Flights from Washington, D.C. (Any) to Seattle (SEA)?

Fares across the airlines on the route in one search
Nonstop and connecting flights side by side
A month of fares at a glance for september travel
Price alerts: we watch the fare and alert you when it drops

Planning a trip from Washington, D.C. (Any) to Seattle (SEA) in september? SlickTrip shows the cheapest economy fares across airlines, nonstop or with stops. Set an alert and we watch the route for you, then email you when the price drops. Booking happens on the airline's or travel site's own page.