Cheap Flights from Washington to Bellevue

View €90 flight on Tue, 12 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 €90 for one-way flights and €180 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, 18 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
€180 Return, found 11 hours ago
€180
Return
found 11 hours ago
Select American Airlines flight, departing Mon, 18 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at €180 found 11 hours ago
American Airlines
Mon, 18 Aug - Tue, 26 Aug
BWI
Baltimore
SEA
Seattle
€211 Return, found 11 hours ago
€211
Return
found 11 hours ago
Select American Airlines flight, departing Mon, 18 Aug from Baltimore to Seattle, returning Tue, 26 Aug, priced at €211 found 11 hours ago
Delta
Sat, 6 Sep - Sat, 13 Sep
DCA
Washington
SEA
Seattle
€224 Return, found 12 hours ago
€224
Return
found 12 hours ago
Select Delta flight, departing Sat, 6 Sep from Washington to Seattle, returning Sat, 13 Sep, priced at €224 found 12 hours ago
Delta
Sat, 6 Sep - Sat, 13 Sep
DCA
Washington
SEA
Seattle
€233 Return, found 12 hours ago
€233
Return
found 12 hours ago
Select Delta flight, departing Sat, 6 Sep from Washington to Seattle, returning Sat, 13 Sep, priced at €233 found 12 hours ago
American Airlines
Sat, 6 Sep - Sat, 13 Sep
DCA
Washington
SEA
Seattle
€241 Return, found 12 hours ago
€241
Return
found 12 hours ago
Select American Airlines flight, departing Sat, 6 Sep from Washington to Seattle, returning Sat, 13 Sep, priced at €241 found 12 hours ago
United
Sat, 16 Aug - Sat, 23 Aug
IAD
Washington
SEA
Seattle
€295 Return, found 2 days ago
€295
Return
found 2 days ago
Select United flight, departing Sat, 16 Aug from Washington to Seattle, returning Sat, 23 Aug, priced at €295 found 2 days ago

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

September is typically the cheapest month to fly

From €121 - €232 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.