Cheap Flights from Washington to Bellevue

View €74 flight on Mon, 18 Aug 2025Opens in a new window

Popular airlines from Washington to Bellevue

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Cheap flights from Washington to Bellevue (WAS-SEA)

Prices were available within the past 7 days and start at €74 for one-way flights and €147 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, 18 Aug - Mon, 25 Aug
DCA
Washington
SEA
Seattle
€147 Return, found 4 days ago
€147
Return
found 4 days ago
Select American Airlines flight, departing Mon, 18 Aug from Washington to Seattle, returning Mon, 25 Aug, priced at €147 found 4 days ago
American Airlines
Mon, 18 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
€178 Return, found 3 days ago
€178
Return
found 3 days ago
Select American Airlines flight, departing Mon, 18 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at €178 found 3 days ago
American Airlines
Mon, 18 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
€193 Return, found 3 days ago
€193
Return
found 3 days ago
Select American Airlines flight, departing Mon, 18 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at €193 found 3 days ago
Delta
Mon, 18 Aug - Mon, 25 Aug
DCA
Washington
SEA
Seattle
€201 Return, found 4 days ago
€201
Return
found 4 days ago
Select Delta flight, departing Mon, 18 Aug from Washington to Seattle, returning Mon, 25 Aug, priced at €201 found 4 days ago
JetBlue Airways
Mon, 18 Aug - Mon, 25 Aug
DCA
Washington
SEA
Seattle
€240 Return, found 4 days ago
€240
Return
found 4 days ago
Select JetBlue Airways flight, departing Mon, 18 Aug from Washington to Seattle, returning Mon, 25 Aug, priced at €240 found 4 days ago
United
Mon, 18 Aug - Mon, 25 Aug
DCA
Washington
SEA
Seattle
€242 Return, found 4 days ago
€242
Return
found 4 days ago
Select United flight, departing Mon, 18 Aug from Washington to Seattle, returning Mon, 25 Aug, priced at €242 found 4 days ago

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

September is typically the cheapest month to fly

From €118 - €215 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.