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Cheap flights from Knoxville to Seattle from $112

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 5/7. 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.
American Airlines Logo
4:09 pm - 12:44 am
TYS
-
SEA
11h 35m
1 stop
American Airlines Logo
10:25 am - 11:56 pm
SEA
-
TYS
10h 31m
1 stop
$247American Airlines
Sat, Apr 25 - Sat, May 2
Multiple Airlines Logo
6:51 pm - 12:01 pm
TYS
-
SEA
20h 10m
1 stop
Multiple Airlines Logo
7:33 pm - 7:03 pm
SEA
-
TYS
20h 30m
1 stop
$316Multiple Airlines
Fri, Feb 27 - Tue, Mar 3
Multiple Airlines Logo
1:43 pm - 8:20 pm
TYS
-
SEA
9h 37m
1 stop
Multiple Airlines Logo
6:57 pm - 3:33 pm
SEA
-
TYS
17h 36m
1 stop
$317Multiple Airlines
Fri, May 1 - Sat, May 9
Multiple Airlines Logo
1:59 pm - 9:27 am
TYS
-
SEA
22h 28m
2 stops
Multiple Airlines Logo
6:57 pm - 3:33 pm
SEA
-
TYS
17h 36m
1 stop
$318Multiple Airlines
Sat, Apr 18 - Wed, Apr 22
Multiple Airlines Logo
1:43 pm - 8:20 pm
TYS
-
SEA
9h 37m
1 stop
Multiple Airlines Logo
6:57 pm - 3:33 pm
SEA
-
TYS
17h 36m
1 stop
$326Multiple Airlines
Fri, May 1 - Sat, May 9
Multiple Airlines Logo
3:24 pm - 9:20 pm
TYS
-
SEA
8h 56m
1 stop
Multiple Airlines Logo
5:59 pm - 10:24 pm
SEA
-
TYS
25h 25m
2 stops
$330Multiple Airlines
Sun, Apr 5 - Sun, Apr 12
Multiple Airlines Logo
3:24 pm - 9:20 pm
TYS
-
SEA
8h 56m
1 stop
Multiple Airlines Logo
12:42 pm - 3:28 pm
SEA
-
TYS
23h 46m
1 stop
$337Multiple Airlines
Sun, Apr 5 - Sun, Apr 12
Multiple Airlines Logo
6:51 pm - 12:01 pm
TYS
-
SEA
20h 10m
1 stop
Multiple Airlines Logo
7:33 pm - 6:26 pm
SEA
-
TYS
19h 53m
2 stops
$338Multiple Airlines
Fri, Feb 27 - Tue, Mar 3
United Airlines Logo
5:48 pm - 10:37 pm
TYS
-
SEA
7h 49m
1 stop
United Airlines Logo
5:00 am - 3:06 pm
SEA
-
TYS
7h 06m
1 stop
$354United Airlines
Tue, Apr 21 - Wed, Apr 22
Multiple Airlines Logo
6:51 pm - 12:01 pm
TYS
-
SEA
20h 10m
1 stop
Multiple Airlines Logo
7:33 pm - 7:03 pm
SEA
-
TYS
20h 30m
1 stop
$357Multiple Airlines
Fri, Feb 27 - Tue, Mar 3

American Airlines flights from Knoxville to Seattle

Our best American Airlines deals on Knoxville to Seattle flight tickets
American Airlines
Apr 25
TYS4:09 pmKnoxville McGhee Tyson
11h 35m
1 stop
SEA12:44 amSeattle/Tacoma Intl
May 2
SEA10:25 amSeattle/Tacoma Intl
10h 31m
1 stop
TYS11:56 pmKnoxville McGhee Tyson
$247
American Airlines
Apr 25
TYS4:09 pmKnoxville McGhee Tyson
9h 38m
1 stop
SEA10:47 pmSeattle/Tacoma Intl
May 2
SEA7:09 amSeattle/Tacoma Intl
7h 55m
1 stop
TYS6:04 pmKnoxville McGhee Tyson
$385
American Airlines
Mar 12
TYS4:02 pmKnoxville McGhee Tyson
10h 11m
1 stop
SEA11:13 pmSeattle/Tacoma Intl
Mar 18
SEA12:59 amSeattle/Tacoma Intl
7h 31m
1 stop
TYS11:30 amKnoxville McGhee Tyson
$411

Southwest flights from Knoxville to Seattle

Our best Southwest deals on Knoxville to Seattle flight tickets
Southwest
Mar 27
TYS3:45 pmKnoxville McGhee Tyson
12h 40m
2 stops
SEA1:25 amSeattle/Tacoma Intl
Mar 31
SEA5:30 amSeattle/Tacoma Intl
11h 35m
2 stops
TYS8:05 pmKnoxville McGhee Tyson
$434
Southwest
Mar 5
TYS3:45 pmKnoxville McGhee Tyson
12h 40m
2 stops
SEA1:25 amSeattle/Tacoma Intl
Mar 11
SEA5:30 amSeattle/Tacoma Intl
12h 40m
2 stops
TYS9:10 pmKnoxville McGhee Tyson
$444
Southwest
Aug 7
TYS7:10 amKnoxville McGhee Tyson
9h 45m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Aug 17
SEA11:05 pmSeattle/Tacoma Intl
10h 00m
2 stops
TYS12:05 pmKnoxville McGhee Tyson
$452

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 February 14, 2026.
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

Sat 4/25

4:09 pm-12:44 am

1 stop11h 35m

Seattle/Tacoma Intl

Sat 5/2

10:25 am-11:56 pm

1 stop10h 31m

$247

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Fri 2/27

6:51 pm-12:01 pm

1 stop20h 10m

Seattle/Tacoma Intl

Tue 3/3

7:33 pm-7:03 pm

1 stop20h 30m

$316

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Fri 5/1

1:43 pm-8:20 pm

1 stop9h 37m

Seattle/Tacoma Intl

Sat 5/9

6:57 pm-3:33 pm

1 stop17h 36m

$317

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 4/18

1:59 pm-9:27 am

2 stops22h 28m

Seattle/Tacoma Intl

Wed 4/22

6:57 pm-3:33 pm

1 stop17h 36m

$318

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Fri 5/1

1:43 pm-8:20 pm

1 stop9h 37m

Seattle/Tacoma Intl

Sat 5/9

6:57 pm-3:33 pm

1 stop17h 36m

$326

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sun 4/5

3:24 pm-9:20 pm

1 stop8h 56m

Seattle/Tacoma Intl

Sun 4/12

5:59 pm-10:24 pm

2 stops25h 25m

$330

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sun 4/5

3:24 pm-9:20 pm

1 stop8h 56m

Seattle/Tacoma Intl

Sun 4/12

12:42 pm-3:28 pm

1 stop23h 46m

$337

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Fri 2/27

6:51 pm-12:01 pm

1 stop20h 10m

Seattle/Tacoma Intl

Tue 3/3

7:33 pm-6:26 pm

2 stops19h 53m

$338

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Tue 4/21

5:48 pm-10:37 pm

1 stop7h 49m

Seattle/Tacoma Intl

Wed 4/22

5:00 am-3:06 pm

1 stop7h 06m

$354

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Fri 2/27

6:51 pm-12:01 pm

1 stop20h 10m

Seattle/Tacoma Intl

Tue 3/3

7:33 pm-7:03 pm

1 stop20h 30m

$357

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 $383. 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 $556 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 $474 on momondo.

How have Knoxville to Seattle flight prices changed over time?

As of February 2026, prices for Knoxville to Seattle flights are approximately 21% 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

Fastest flight time

7h 20m

Direct flights

None
The fastest flight from Knoxville to Seattle takes 7h 20m
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 20m, 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 $179Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
American AirlinesPriceFrom $312Free CancellationRating
7.2
11,288 reviews
Search American Airlines flights
DeltaPriceFrom $368Free CancellationRating
7.9
8,203 reviews
Search Delta flights
United AirlinesPriceFrom $382Free CancellationRating
7.4
9,289 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
Redmond
Puyallup
Cle Elum
Lakewood
Tukwila
Federal Way
Kirkland
Westport
Centralia
Fife
Tumwater

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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