Flights from Seattle to Knoxville

Cheapest flights from Seattle

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 19 - Sat, Aug 30

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$277 Roundtrip, found 3 days ago

$277

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Aug 19 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sat, Aug 30, priced at $277 found 3 days ago

Wed, Aug 6 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$287 Roundtrip, found 3 days ago

$287

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Wed, Aug 6 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $287 found 3 days ago

Wed, Aug 6 - Mon, Aug 11

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$297 Roundtrip, found 3 days ago

$297

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Wed, Aug 6 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Mon, Aug 11, priced at $297 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$307 Roundtrip, found 3 days ago

$307

Roundtrip

found 3 days ago

Select United flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $307 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$317 Roundtrip, found 3 days ago

$317

Roundtrip

found 3 days ago

Select United flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $317 found 3 days ago

Mon, Aug 4 - Mon, Aug 11

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$322 Roundtrip, found 3 days ago

$322

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Mon, Aug 11, priced at $322 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$327 Roundtrip, found 3 days ago

$327

Roundtrip

found 3 days ago

Select Alaska Airlines flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $327 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$334 Roundtrip, found 3 days ago

$334

Roundtrip

found 3 days ago

Select United flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $334 found 3 days ago

Thu, Jul 31 - Thu, Aug 7

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$334 Roundtrip, found 15 hours ago

$334

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Thu, Jul 31 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Thu, Aug 7, priced at $334 found 15 hours ago

Fri, Aug 15 - Sat, Aug 30

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$338 Roundtrip, found 3 days ago

$338

Roundtrip

found 3 days ago

Select Delta flight, departing Fri, Aug 15 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sat, Aug 30, priced at $338 found 3 days ago

Mon, Aug 4 - Fri, Aug 8

PAE

Seattle Paine Field Intl. Airport

IAD

Washington Dulles Intl.

$339 Roundtrip, found 3 days ago

$339

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Seattle Paine Field Intl. Airport to Washington Dulles Intl., returning Fri, Aug 8, priced at $339 found 3 days ago

Fri, Aug 1 - Fri, Aug 8

PAE

Seattle Paine Field Intl. Airport

IAD

Washington Dulles Intl.

$344 Roundtrip, found 3 days ago

$344

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Seattle Paine Field Intl. Airport to Washington Dulles Intl., returning Fri, Aug 8, priced at $344 found 3 days ago

Wed, Aug 6 - Sun, Aug 10

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$348 Roundtrip, found 3 days ago

$348

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Aug 6 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $348 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$361 Roundtrip, found 3 days ago

$361

Roundtrip

found 3 days ago

Select United flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $361 found 3 days ago

Thu, Aug 7 - Wed, Aug 13

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$370 Roundtrip, found 3 days ago

$370

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Thu, Aug 7 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Wed, Aug 13, priced at $370 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$370 Roundtrip, found 3 days ago

$370

Roundtrip

found 3 days ago

Select United flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $370 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$376 Roundtrip, found 3 days ago

$376

Roundtrip

found 3 days ago

Select United flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $376 found 3 days ago

Fri, Aug 1 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$378 Roundtrip, found 3 days ago

$378

Roundtrip

found 3 days ago

Select Delta flight, departing Fri, Aug 1 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $378 found 3 days ago

Wed, Oct 22 - Sun, Oct 26

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$379 Roundtrip, found 3 days ago

$379

Roundtrip

found 3 days ago

Select United flight, departing Wed, Oct 22 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Oct 26, priced at $379 found 3 days ago

Sun, Aug 3 - Sun, Aug 10

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$567 Roundtrip, found 7 hours ago

$567

Roundtrip

found 7 hours ago

Select American Airlines flight, departing Sun, Aug 3 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sun, Aug 10, priced at $567 found 7 hours ago