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Washington D C to Seattle One-Way Flights (WASA-SEA) in December 2026

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

Washington, D.C. (Any) to Seattle (SEA) in December 2026

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Finding fares for December and January…

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

FLLA destination

Economy Roundtrip to Fort Lauderdale (Any)

Washington, D.C. (Any) to Fort Lauderdale (Any) in December

PUJ destination

Economy Roundtrip to Punta Cana (PUJ)

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

CUN destination

Economy Roundtrip to Cancun (CUN)

Washington, D.C. (Any) to Cancun (CUN) in December

TPAA destination

Economy Roundtrip to Tampa (Any)

Washington, D.C. (Any) to Tampa (Any) in February

AMD destination

Premium Economy Roundtrip to Ahmedabad (AMD)

Washington, D.C. (Any) to Ahmedabad (AMD) in February

ORLB destination

Economy Roundtrip to Orlando (Any)

Washington, D.C. (Any) to Orlando (Any) in March

Flights from Other Cities

SEA destination

Economy Roundtrip to Seattle (SEA)

Phoenix (PHX) to Seattle (SEA) in December

SEA destination

Economy Roundtrip to Seattle (SEA)

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

SEA destination

Economy One-way to Seattle (SEA)

Miami (MIA) to Seattle (SEA) in May

SEA destination

Economy Roundtrip to Seattle (SEA)

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

SEA destination

Economy Roundtrip to Seattle (SEA)

Atlanta (ATL) to Seattle (SEA) in May

SEA destination

Economy Roundtrip to Seattle (SEA)

Dallas (DFW) to Seattle (SEA) in May

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

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 december 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 december? 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.