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Cheap flights from Knoxville to Seattle from $164

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Seattle departing on 2/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Knoxville to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:00 am - 11:56 am
TYS
-
SEA
28h 56m2 stops
Multiple Airlines Logo
12:34 pm - 3:35 pm
SEA
-
TYS
24h 01m1 stop
$274Multiple Airlines
Sun, Jan 25 - Sun, Feb 1
Frontier Logo
4:23 pm - 11:21 am
TYS
-
SEA
21h 58m1 stop
Frontier Logo
3:58 pm - 7:23 pm
SEA
-
TYS
24h 25m1 stop
$279Frontier
Thu, Jan 8 - Sat, Jan 17
American Airlines Logo
7:54 am - 10:20 pm
TYS
-
SEA
17h 26m1 stop
American Airlines Logo
8:04 am - 9:54 pm
SEA
-
TYS
10h 50m1 stop
$355American Airlines
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
11:07 am - 4:01 pm
TYS
-
SEA
7h 54m1 stop
United Airlines Logo
7:00 am - 4:53 pm
SEA
-
TYS
6h 53m1 stop
$385United Airlines
Thu, Jan 29 - Mon, Feb 2
United Airlines Logo
9:30 am - 6:26 pm
TYS
-
SEA
11h 56m2 stops
United Airlines Logo
10:58 am - 8:52 pm
SEA
-
TYS
6h 54m1 stop
$390United Airlines
Thu, Jan 29 - Mon, Feb 2
American Airlines Logo
6:00 am - 1:49 pm
TYS
-
SEA
10h 49m2 stops
American Airlines Logo
10:00 am - 10:47 pm
SEA
-
TYS
9h 47m2 stops
$395American Airlines
Sat, Jan 31 - Sat, Feb 7
American Airlines Logo
3:00 pm - 8:45 pm
TYS
-
SEA
8h 45m1 stop
American Airlines Logo
10:50 am - 10:47 pm
SEA
-
TYS
8h 57m1 stop
$398American Airlines
Wed, Feb 4 - Sun, Feb 8
American Airlines Logo
5:40 am - 10:55 am
TYS
-
SEA
8h 15m1 stop
American Airlines Logo
1:52 pm - 12:28 am
SEA
-
TYS
7h 36m1 stop
$411American Airlines
Thu, Feb 26 - Sat, Mar 7
American Airlines Logo
6:00 am - 1:49 pm
TYS
-
SEA
10h 49m2 stops
American Airlines Logo
6:00 am - 3:46 pm
SEA
-
TYS
6h 46m1 stop
$416American Airlines
Sat, Jan 31 - Fri, Feb 6
Multiple Airlines Logo
12:31 pm - 8:20 pm
TYS
-
SEA
34h 49m2 stops
Multiple Airlines Logo
10:08 pm - 9:27 pm
SEA
-
TYS
20h 19m1 stop
$420Multiple Airlines
Sat, Mar 21 - Sat, Mar 28

United Airlines flights from Knoxville to Seattle

Our best United Airlines deals on Knoxville to Seattle flight tickets
United Airlines
Jan 29
TYS11:07 amKnoxville McGhee Tyson
7h 54m
1 stop
SEA4:01 pmSeattle/Tacoma Intl
Feb 2
SEA7:00 amSeattle/Tacoma Intl
6h 53m
1 stop
TYS4:53 pmKnoxville McGhee Tyson
$385
Find similar
United Airlines
Jan 29
TYS9:30 amKnoxville McGhee Tyson
11h 56m
2 stops
SEA6:26 pmSeattle/Tacoma Intl
Feb 2
SEA10:58 amSeattle/Tacoma Intl
6h 54m
1 stop
TYS8:52 pmKnoxville McGhee Tyson
$390
Find similar
United Airlines
Jan 23
TYS6:59 amKnoxville McGhee Tyson
8h 50m
1 stop
SEA12:49 pmSeattle/Tacoma Intl
Jan 26
SEA8:10 amSeattle/Tacoma Intl
8h 17m
1 stop
TYS7:27 pmKnoxville McGhee Tyson
$441
Find similar

American Airlines flights from Knoxville to Seattle

Our best American Airlines deals on Knoxville to Seattle flight tickets
American Airlines
Jan 31
TYS7:54 amKnoxville McGhee Tyson
17h 26m
1 stop
SEA10:20 pmSeattle/Tacoma Intl
Feb 7
SEA8:04 amSeattle/Tacoma Intl
10h 50m
1 stop
TYS9:54 pmKnoxville McGhee Tyson
$355
Find similar
American Airlines
Jan 31
TYS6:00 amKnoxville McGhee Tyson
10h 49m
2 stops
SEA1:49 pmSeattle/Tacoma Intl
Feb 7
SEA10:00 amSeattle/Tacoma Intl
9h 47m
2 stops
TYS10:47 pmKnoxville McGhee Tyson
$395
Find similar
American Airlines
Feb 4
TYS3:00 pmKnoxville McGhee Tyson
8h 45m
1 stop
SEA8:45 pmSeattle/Tacoma Intl
Feb 8
SEA10:50 amSeattle/Tacoma Intl
8h 57m
1 stop
TYS10:47 pmKnoxville McGhee Tyson
$398
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 30, 2025.
Use the filters below to find and compare flights from Knoxville to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sun 1/25

10:00 am-11:56 am

2 stops28h 56m

Seattle/Tacoma Intl

Sun 2/1

12:34 pm-3:35 pm

1 stop24h 01m

$274

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 1/8

4:23 pm-11:21 am

1 stop21h 58m

Seattle/Tacoma Intl

Sat 1/17

3:58 pm-7:23 pm

1 stop24h 25m

$279

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 1/31

7:54 am-10:20 pm

1 stop17h 26m

Seattle/Tacoma Intl

Sat 2/7

8:04 am-9:54 pm

1 stop10h 50m

$355

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 1/29

11:07 am-4:01 pm

1 stop7h 54m

Seattle/Tacoma Intl

Mon 2/2

7:00 am-4:53 pm

1 stop6h 53m

$385

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 1/29

9:30 am-6:26 pm

2 stops11h 56m

Seattle/Tacoma Intl

Mon 2/2

10:58 am-8:52 pm

1 stop6h 54m

$390

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 1/31

6:00 am-1:49 pm

2 stops10h 49m

Seattle/Tacoma Intl

Sat 2/7

10:00 am-10:47 pm

2 stops9h 47m

$395

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 2/4

3:00 pm-8:45 pm

1 stop8h 45m

Seattle/Tacoma Intl

Sun 2/8

10:50 am-10:47 pm

1 stop8h 57m

$398

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 2/26

5:40 am-10:55 am

1 stop8h 15m

Seattle/Tacoma Intl

Sat 3/7

1:52 pm-12:28 am

1 stop7h 36m

$411

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 1/31

6:00 am-1:49 pm

2 stops10h 49m

Seattle/Tacoma Intl

Fri 2/6

6:00 am-3:46 pm

1 stop6h 46m

$416

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 3/21

12:31 pm-8:20 pm

2 stops34h 49m

Seattle/Tacoma Intl

Sat 3/28

10:08 pm-9:27 pm

1 stop20h 19m

$420

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 cheapest month to fly to Seattle?

In general, August 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 $408. If you don’t want to visit Seattle in August, then you should wait until November to fly from Knoxville, when ticket prices are also cheap, with an average price of $442.

How far in advance should I book a flight 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 $616 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 $515 on momondo.

How have Knoxville to Seattle flight prices changed over time?

As of December 2025, prices for Knoxville to Seattle flights are approximately 16% cheaper 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

Fastest flight time

7h 46m

Direct flights

None
The fastest flight from Knoxville to Seattle takes 7h 46m
There are no direct flights from Knoxville to Seattle. There are no popular flight routes from Knoxville to Seattle.
Search flight deals

  • 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 46m, 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
FrontierPriceFrom $248Free CancellationRating
5.7
3,065 reviews
Search Frontier flights
American AirlinesPriceFrom $327Free CancellationRating
7.2
11,073 reviews
Search American Airlines flights
DeltaPriceFrom $368Free CancellationRating
7.9
8,017 reviews
Search Delta flights
United AirlinesPriceFrom $397Free CancellationRating
7.4
9,122 reviews
Search United 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
Olympia
Lynnwood
Kent
Marysville
Puyallup
Redmond
Tukwila
Federal Way
Cle Elum
Lakewood
Centralia
Fife
Westport
Kirkland
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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