$139 Cheap United flights Washington (IAD) to Seattle (SEA)

$139 Cheap United flights Washington (IAD) to Seattle (SEA)

Prices were available within the past 7 days and start at $139 for one-way flights and $299 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Dec 4 - Sun, Dec 21

IAD

Washington

SEA

Seattle

$299 Roundtrip, found 3 days ago

$299

Roundtrip

found 3 days ago

Select United flight, departing Thu, Dec 4 from Washington to Seattle, returning Sun, Dec 21, priced at $299 found 3 days ago

Wed, Dec 3 - Sun, Dec 21

IAD

Washington

SEA

Seattle

$318 Roundtrip, found 3 days ago

$318

Roundtrip

found 3 days ago

Select United flight, departing Wed, Dec 3 from Washington to Seattle, returning Sun, Dec 21, priced at $318 found 3 days ago

Mon, Dec 22 - Sun, Jan 4

IAD

Washington

SEA

Seattle

$363 Roundtrip, found 3 days ago

$363

Roundtrip

found 3 days ago

Select United flight, departing Mon, Dec 22 from Washington to Seattle, returning Sun, Jan 4, priced at $363 found 3 days ago

Sun, Dec 21 - Tue, Jan 6

IAD

Washington

SEA

Seattle

$364 Roundtrip, found 3 days ago

$364

Roundtrip

found 3 days ago

Select United flight, departing Sun, Dec 21 from Washington to Seattle, returning Tue, Jan 6, priced at $364 found 3 days ago

Sun, Jun 28 - Mon, Jun 29

IAD

Washington

SEA

Seattle

$367 Roundtrip, found 23 hours ago

$367

Roundtrip

found 23 hours ago

Select United flight, departing Sun, Jun 28 from Washington to Seattle, returning Mon, Jun 29, priced at $367 found 23 hours ago

Sun, Jun 28 - Mon, Jun 29

IAD

Washington

SEA

Seattle

$377 Roundtrip, found 23 hours ago

$377

Roundtrip

found 23 hours ago

Select United flight, departing Sun, Jun 28 from Washington to Seattle, returning Mon, Jun 29, priced at $377 found 23 hours ago