S$151 Cheap Flights from Washington to Seattle

View S$151 flight on Thu, 11 Dec, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Washington to Seattle (IAD-SEA)

Prices were available within the past 7 days and start at S$151 for one-way flights and S$258 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 11 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$258 Return, found 3 days ago
S$258
Return
found 3 days ago
Select Delta flight, departing Thu, 11 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$258 found 3 days ago
Delta
Thu, 11 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$270 Return, found 3 days ago
S$270
Return
found 3 days ago
Select Delta flight, departing Thu, 11 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$270 found 3 days ago
Delta
Thu, 11 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$283 Return, found 3 days ago
S$283
Return
found 3 days ago
Select Delta flight, departing Thu, 11 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$283 found 3 days ago
Delta
Fri, 12 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$297 Return, found 3 days ago
S$297
Return
found 3 days ago
Select Delta flight, departing Fri, 12 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$297 found 3 days ago
Delta
Fri, 12 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$310 Return, found 3 days ago
S$310
Return
found 3 days ago
Select Delta flight, departing Fri, 12 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$310 found 3 days ago
Delta
Fri, 12 Dec - Sun, 14 Dec
IAD
Washington
SEA
Seattle
S$325 Return, found 3 days ago
S$325
Return
found 3 days ago
Select Delta flight, departing Fri, 12 Dec from Washington to Seattle, returning Sun, 14 Dec, priced at S$325 found 3 days ago
Delta
Fri, 12 Dec - Sun, 14 Dec
IAD
Washington
SEA
Seattle
S$338 Return, found 3 days ago
S$338
Return
found 3 days ago
Select Delta flight, departing Fri, 12 Dec from Washington to Seattle, returning Sun, 14 Dec, priced at S$338 found 3 days ago
United
Thu, 11 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$343 Return, found 3 days ago
S$343
Return
found 3 days ago
Select United flight, departing Thu, 11 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$343 found 3 days ago
United
Thu, 11 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$355 Return, found 3 days ago
S$355
Return
found 3 days ago
Select United flight, departing Thu, 11 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$355 found 3 days ago
American Airlines
Fri, 12 Dec - Mon, 15 Dec
IAD
Washington
SEA
Seattle
S$403 Return, found 3 days ago
S$403
Return
found 3 days ago
Select American Airlines flight, departing Fri, 12 Dec from Washington to Seattle, returning Mon, 15 Dec, priced at S$403 found 3 days ago

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Find the cheapest month to fly from Washington (IAD) to Seattle (SEA)

January is typically the cheapest month to fly

From S$221 - S$462 per traveller.
Washington to Seattle route information
Origin airport
Washington Dulles Intl.
Destination airport
Seattle - Tacoma Intl.
Return price
S$257
Distance
3679 km
Average flight time
2 hours 58 mins

Perfect flights from Washington to Seattle

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*Note: Prices may vary based on availability and are subject to change.

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