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Cheap flights from Knoxville to Seattle from $140

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Knoxville to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:30 pm - 11:47 pmTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
9h 17m1 stop Dallas/Fort Worth
American Airlines Logo
5:10 am - 4:40 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
8h 30m1 stop Dallas/Fort Worth
$279American Airlines
Thu, Nov 19 - Thu, Nov 26
American Airlines Logo
6:00 am - 11:29 amTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
8h 29m1 stop Charlotte Douglas
American Airlines Logo
6:20 am - 7:05 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
9h 45m1 stop Chicago O'Hare Intl
$279American Airlines
Sat, Dec 5 - Mon, Dec 7
United Airlines Logo
11:53 am - 8:47 pmTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
11h 54m2 stops Houston George Bush Intcntl San Francisco
United Airlines Logo
5:05 am - 2:41 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
6h 36m1 stop Denver Intl
$284United Airlines
Sat, Dec 5 - Mon, Dec 7
Southwest Logo
7:10 am - 8:10 pmTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
16h 00m2 stops Nashville Intl Sacramento Intl
Southwest Logo
12:15 am - 12:20 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
9h 05m2 stops Chicago Midway Nashville Intl
$295Southwest
Sat, Dec 5 - Sun, Dec 6
Southwest Logo
4:15 pm - 10:50 pmTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
9h 35m1 stop Denver Intl
Southwest Logo
6:10 am - 3:30 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
6h 20m1 stop Denver Intl
$301Southwest
Fri, Dec 4 - Mon, Dec 7
United Airlines Logo
5:05 pm - 11:15 pmTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
9h 10m1 stop Denver Intl
United Airlines Logo
7:00 am - 9:57 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
11h 57m2 stops San Francisco Houston George Bush Intcntl
$402United Airlines
Thu, Nov 19 - Thu, Nov 26
Delta Logo
5:30 am - 10:26 amTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
7h 56m1 stop Atlanta Hartsfield-Jackson
Delta Logo
9:20 pm - 9:12 amSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
8h 52m1 stop Atlanta Hartsfield-Jackson
$443Delta
Fri, Feb 26 - Mon, Mar 15
Delta Logo
5:40 am - 10:03 amTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
7h 23m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:00 am - 5:49 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
8h 49m1 stop Detroit Metropolitan Wayne County
$453Delta
Fri, Nov 6 - Tue, Nov 10
Multiple Airlines Logo
12:38 pm - 3:22 pmTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
29h 44m2 stops Philadelphia Denver Intl
Multiple Airlines Logo
4:37 pm - 1:35 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
17h 58m1 stop Denver Intl
$465Multiple Airlines
Fri, Nov 20 - Mon, Nov 23
Multiple Airlines Logo
6:30 am - 6:33 pmTYS  Knoxville McGhee Tyson-SEA Seattle/Tacoma Intl
15h 03m2 stops Denver Intl Los Angeles
Multiple Airlines Logo
9:13 pm - 10:35 pmSEA  Seattle/Tacoma Intl-TYS Knoxville McGhee Tyson
22h 22m1 stop Las Vegas Harry Reid Intl
$511Multiple Airlines
Thu, Nov 5 - Thu, Nov 12

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Southwest flights from Knoxville to Seattle

Our best Southwest deals on Knoxville to Seattle flight tickets
Southwest
Dec 2
TYS2:40 pmKnoxville McGhee Tyson
11h 10m
2 stops
SEA10:50 pmSeattle/Tacoma Intl
Dec 5
SEA6:45 amSeattle/Tacoma Intl
6h 25m
1 stop
TYS4:10 pmKnoxville McGhee Tyson
$284
Southwest
Dec 5
TYS7:10 amKnoxville McGhee Tyson
16h 00m
2 stops
SEA8:10 pmSeattle/Tacoma Intl
Dec 6
SEA12:15 amSeattle/Tacoma Intl
9h 05m
2 stops
TYS12:20 pmKnoxville McGhee Tyson
$295
Southwest
Dec 4
TYS4:15 pmKnoxville McGhee Tyson
9h 35m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
Dec 7
SEA6:10 amSeattle/Tacoma Intl
6h 20m
1 stop
TYS3:30 pmKnoxville McGhee Tyson
$301

Delta flights from Knoxville to Seattle

Our best Delta deals on Knoxville to Seattle flight tickets
Delta
Nov 20
TYS5:40 amKnoxville McGhee Tyson
7h 25m
1 stop
SEA10:05 amSeattle/Tacoma Intl
Nov 27
SEA6:00 amSeattle/Tacoma Intl
6h 39m
1 stop
TYS3:39 pmKnoxville McGhee Tyson
$401
Delta
Feb 26
TYS5:30 amKnoxville McGhee Tyson
7h 56m
1 stop
SEA10:26 amSeattle/Tacoma Intl
Mar 15
SEA9:20 pmSeattle/Tacoma Intl
8h 52m
1 stop
TYS9:12 amKnoxville McGhee Tyson
$443
Delta
Nov 5
TYS5:40 amKnoxville McGhee Tyson
7h 23m
1 stop
SEA10:03 amSeattle/Tacoma Intl
Nov 9
SEA11:15 pmSeattle/Tacoma Intl
8h 05m
1 stop
TYS10:20 amKnoxville McGhee Tyson
$453

momondo Fare Finder

 
Use the filters below to find and compare flights from Knoxville to Seattle that are best for you.

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Route

Depart

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Price

Cheapest round-trip

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Thu 11/19

5:30 pm-11:47 pm

1 stop9h 17m

Seattle/Tacoma Intl

Thu 11/26

5:10 am-4:40 pm

1 stop8h 30m

$279

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Sat 12/5

6:00 am-11:29 am

1 stop8h 29m

Seattle/Tacoma Intl

Mon 12/7

6:20 am-7:05 pm

1 stop9h 45m

$279

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Sat 12/5

11:53 am-8:47 pm

2 stops11h 54m

Seattle/Tacoma Intl

Mon 12/7

5:05 am-2:41 pm

1 stop6h 36m

$284

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Sat 12/5

7:10 am-8:10 pm

2 stops16h 00m

Seattle/Tacoma Intl

Sun 12/6

12:15 am-12:20 pm

2 stops9h 05m

$295
Quickest round-trip

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Fri 12/4

4:15 pm-10:50 pm

1 stop9h 35m

Seattle/Tacoma Intl

Mon 12/7

6:10 am-3:30 pm

1 stop6h 20m

$301

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Thu 11/19

5:05 pm-11:15 pm

1 stop9h 10m

Seattle/Tacoma Intl

Thu 11/26

7:00 am-9:57 pm

2 stops11h 57m

$402

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Fri 2/26

5:30 am-10:26 am

1 stop7h 56m

Seattle/Tacoma Intl

Mon 3/15

9:20 pm-9:12 am

1 stop8h 52m

$443

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Fri 11/6

5:40 am-10:03 am

1 stop7h 23m

Seattle/Tacoma Intl

Tue 11/10

6:00 am-5:49 pm

1 stop8h 49m

$453

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Fri 11/20

12:38 pm-3:22 pm

2 stops29h 44m

Seattle/Tacoma Intl

Mon 11/23

4:37 pm-1:35 pm

1 stop17h 58m

$465

KnoxvilleSeattle

TYS Knoxville McGhee Tyson - SEA Seattle/Tacoma Intl

TYSSEA

Knoxville McGhee Tyson

Thu 11/5

6:30 am-6:33 pm

2 stops15h 03m

Seattle/Tacoma Intl

Thu 11/12

9:13 pm-10:35 pm

1 stop22h 22m

$511

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Knoxville to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Knoxville and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from $398 to $564.
The lowest price recently found on this route was $279.

What is the cheapest month to fly to Seattle?

In general, November is the cheapest month to fly from Knoxville to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $436. If you don’t want to visit Seattle in November, then you should wait until September to fly from Knoxville, when ticket prices are also cheap, with an average price of $476.

How far in advance should I book a flight from Knoxville to Seattle?

You are more likely to see cheaper flights to Seattle from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $553 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Knoxville for as low as $432 on momondo.

How have Knoxville to Seattle flight prices changed over time?

As of October 2026, prices for Knoxville to Seattle flights are approximately 78% more expensive when compared to flights at the same time last year.

When to book flights from Knoxville to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Knoxville to Seattle (TYS to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Seattle

Best Price Found

$140

Fastest flight time

7h 25m

Direct flights

None
The best one-way flight to Seattle from Knoxville in the past 72 hours is $140. The best round-trip flight deal from Knoxville to Seattle found on momondo in the last 72 hours is $279.
The fastest flight from Knoxville to Seattle takes 7h 25m
There are no direct flights from Knoxville to Seattle. There are no popular flight routes from Knoxville to Seattle.
Search flight deals

Frequently asked questions about flying from Knoxville to Seattle

  • How far is Knoxville McGhee Tyson to Seattle/Tacoma Intl by plane?

    The distance between Knoxville McGhee Tyson and Seattle/Tacoma Intl is about 2108.9 mi. Flights usually cover this in 7h 25m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Knoxville to Seattle?

Best airlines flying from Knoxville to Seattle

Compare and see reviews for airlines that fly from Knoxville to Seattle with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $358Free CancellationRating
7.3
10,399 reviews
Search United Airlines flights
DeltaPriceFrom $362Free CancellationRating
7.8
8,661 reviews
Search Delta flights
American AirlinesPriceFrom $384Free CancellationRating
7.0
12,184 reviews
Search American Airlines flights
SouthwestPriceFrom $386Free CancellationRating
7.9
4,208 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $603Free CancellationRating
7.9
13,106 reviews
Search Alaska Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Redmond
Olympia
Federal Way
Kent
Lakewood
Lynnwood
Puyallup
Tukwila
Fife
Cle Elum
Marysville
Lacey
Kirkland
Centralia
Shoreline

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Seattle?

Finding the right flight to Seattle from Knoxville is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Knoxville to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Knoxville on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Knoxville to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Knoxville. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Knoxville to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Knoxville to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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