An Alaska Airlines plane taking off with a snow-capped mountain in the background.

$143 Cheap Flights from Washington (WAS) to Seattle (SEA)

Photo by Port of Seattle
Open Photo by Port of Seattle

Cheap Flights from Washington to Seattle (WAS-SEA)

Prices were available within the past 7 days and start at $143 for one-way flights and $285 for roundtrip, for the period specified. Prices and availability are subject to change.
Southwest Airlines
Tue, Nov 17 - Tue, Nov 17
BWI
Baltimore
SEA
Seattle
$285
Roundtrip
Found 4 hours ago
Select Southwest Airlines flight, departing Tue, Nov 17 from Baltimore to Seattle, returning Tue, Nov 17, priced at $285 Found 4 hours ago
Southwest Airlines
Tue, Dec 8 - Mon, Dec 14
BWI
Baltimore
SEA
Seattle
$298
Roundtrip
Found 1 hour ago
Select Southwest Airlines flight, departing Tue, Dec 8 from Baltimore to Seattle, returning Mon, Dec 14, priced at $298 Found 1 hour ago
Southwest Airlines
Tue, Dec 8 - Mon, Dec 14
BWI
Baltimore
SEA
Seattle
$303
Roundtrip
Found 1 hour ago
Select Southwest Airlines flight, departing Tue, Dec 8 from Baltimore to Seattle, returning Mon, Dec 14, priced at $303 Found 1 hour ago
Southwest Airlines
Tue, Dec 15 - Wed, Dec 23
BWI
Baltimore
SEA
Seattle
$305
Roundtrip
Found 5 hours ago
Select Southwest Airlines flight, departing Tue, Dec 15 from Baltimore to Seattle, returning Wed, Dec 23, priced at $305 Found 5 hours ago
Southwest Airlines
Tue, Dec 8 - Mon, Dec 14
BWI
Baltimore
SEA
Seattle
$308
Roundtrip
Found 1 hour ago
Select Southwest Airlines flight, departing Tue, Dec 8 from Baltimore to Seattle, returning Mon, Dec 14, priced at $308 Found 1 hour ago
Southwest Airlines
Tue, Dec 15 - Wed, Dec 23
BWI
Baltimore
SEA
Seattle
$310
Roundtrip
Found 5 hours ago
Select Southwest Airlines flight, departing Tue, Dec 15 from Baltimore to Seattle, returning Wed, Dec 23, priced at $310 Found 5 hours ago
Alaska Airlines
Sat, Jan 30 - Sun, Jan 31
IAD
Washington
SEA
Seattle
$347
Roundtrip
Found 1 day ago
Select Alaska Airlines flight, departing Sat, Jan 30 from Washington to Seattle, returning Sun, Jan 31, priced at $347 Found 1 day ago
Frontier Airlines
Sat, Oct 24 - Fri, Nov 20
IAD
Washington
SEA
Seattle
$348
Roundtrip
Found 1 day ago
Select Frontier Airlines flight, departing Sat, Oct 24 from Washington to Seattle, returning Fri, Nov 20, priced at $348 Found 1 day ago
Bargain Flight
Fri, Feb 5 - Sat, Feb 6
IAD
Washington
SEA
Seattle
$366
Roundtrip
Found 4 days ago
Select Bargain Flight flight, departing Fri, Feb 5 from Washington to Seattle, returning Sat, Feb 6, priced at $366 Found 4 days ago
Delta
Thu, Nov 26 - Thu, Nov 26
IAD
Washington
SEA
Seattle
$372
Roundtrip
Found 20 hours ago
Select Delta flight, departing Thu, Nov 26 from Washington to Seattle, returning Thu, Nov 26, priced at $372 Found 20 hours ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $438
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $438

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

October is typically the cheapest month to fly

From $196 - $396 per traveler.

Travel information

Origin airport
Washington Dulles Intl. Airport
Destination airport
Seattle-Tacoma International Airport
Distance
2,299 miles away
Airlines serving
Alaska Airlines, Delta, American Airlines, United, Sun Country Airlines, Frontier Airlines
Popular airline
Alaska Airlines
Roundtrip price
$285
Average flight time
6 hours 4 mins
*Available to One Key members.