Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $148

ASAlaska Airlines, Inc.

One Way•Economy

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

IAD

Washington Dulles International Airport

Washington, United States

$260 USD

-43%$148 USD

Verified 13 days ago

September 2026

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31$1881$1832$1833$1884$1885$1936$2137$2638$1839$14810$18811$14812$18813$20314$18315$14816$14817$14818$15419$18820$20321$18322$18823$14824$18825$18826$20727$24628$18329$15230$1551$1992$1993$1994$199

Extremely Rare Availability

3% of dates checked are available within 10% of the lowest price

Wednesday, September 9th, 2026

Outbound Flights

5h 3m·Nonstop

$148 USD

SEASep 9 15:56

→

IADSep 9 23:59

AS 675Boeing 737

5h 5m·Nonstop

$148 USD

SEASep 9 21:35

→

IADSep 10 05:40

AS 367Boeing 737

8h 44m·1 stop

$213 USD

SEASep 9 08:40

→

DFWSep 9 14:53

AS 340Boeing 737

1h 27m layover

DFWSep 9 16:20

→

IADSep 9 20:24

AA 2254Boeing 737MAX 8 Passenger

5h 13m·Nonstop

$233 USD

SEASep 9 08:41

→

IADSep 9 16:54

AS 737Boeing 737MAX 9 Passenger

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