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Cheap flights from Knoxville to Seattle from $133

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 8/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Knoxville to Seattle

Cheap round-trip flights

Frontier Logo
8:36 pm - 12:34 amTYS-SEA
6h 58m1 stop
Frontier Logo
12:40 pm - 7:41 pmSEA-TYS
28h 01m1 stop
$265Frontier
Find Deal
Thu, Aug 21 - Sat, Aug 30
Frontier Logo
8:36 pm - 12:34 amTYS-SEA
6h 58m1 stop
Frontier Logo
6:12 am - 7:50 pmSEA-TYS
10h 38m1 stop
$278Frontier
Find Deal
Thu, Aug 28 - Thu, Sep 4
American Airlines Logo
6:18 pm - 11:05 pmTYS-SEA
7h 47m1 stop
American Airlines Logo
1:22 am - 10:54 amSEA-TYS
6h 32m1 stop
$309American Airlines
Find Deal
Sat, Dec 13 - Wed, Dec 31
United Airlines Logo
4:55 pm - 9:13 pmTYS-SEA
7h 18m1 stop
United Airlines Logo
5:05 am - 6:04 pmSEA-TYS
9h 59m2 stops
$314United Airlines
Find Deal
Fri, Nov 7 - Sat, Nov 15
United Airlines Logo
4:40 pm - 9:17 pmTYS-SEA
7h 37m1 stop
United Airlines Logo
11:54 pm - 10:13 amSEA-TYS
7h 19m1 stop
$325United Airlines
Find Deal
Sat, Aug 30 - Sat, Sep 6
American Airlines Logo
3:04 pm - 8:02 pmTYS-SEA
7h 58m1 stop
American Airlines Logo
11:59 pm - 1:03 pmSEA-TYS
10h 04m1 stop
$339American Airlines
Find Deal
Mon, Aug 18 - Mon, Aug 25
Delta Logo
6:08 pm - 11:54 pmTYS-SEA
8h 46m1 stop
Delta Logo
11:11 pm - 11:41 amSEA-TYS
9h 30m1 stop
$374Delta
Find Deal
Sat, Sep 13 - Sun, Sep 14
Delta Logo
5:45 am - 10:09 amTYS-SEA
7h 24m1 stop
Delta Logo
9:55 pm - 9:00 amSEA-TYS
8h 05m1 stop
$398Delta
Find Deal
Fri, Oct 3 - Tue, Oct 7
Alaska Airlines Logo
4:37 pm - 11:08 pmTYS-SEA
9h 31m1 stop
Alaska Airlines Logo
12:59 am - 11:45 amSEA-TYS
7h 46m1 stop
$409Alaska Airlines
Find Deal
Sat, Oct 4 - Mon, Oct 6
Alaska Airlines Logo
5:30 am - 11:34 amTYS-SEA
9h 04m1 stop
Alaska Airlines Logo
12:33 am - 1:12 pmSEA-TYS
9h 39m1 stop
$484Alaska Airlines
Find Deal
Sun, Aug 31 - Fri, Sep 5

Frontier flights from Knoxville to Seattle

Our best Frontier deals on Knoxville to Seattle flight tickets
Frontier
Aug 21
TYS8:36 pmKnoxville McGhee Tyson
6h 58m
1 stop
SEA12:34 amSeattle/Tacoma Intl
Aug 30
SEA12:40 pmSeattle/Tacoma Intl
28h 01m
1 stop
TYS7:41 pmKnoxville McGhee Tyson
$265
Find similar
Frontier
Aug 28
TYS8:36 pmKnoxville McGhee Tyson
6h 58m
1 stop
SEA12:34 amSeattle/Tacoma Intl
Sep 4
SEA6:12 amSeattle/Tacoma Intl
10h 38m
1 stop
TYS7:50 pmKnoxville McGhee Tyson
$278
Find similar
Frontier
Oct 10
TYS8:22 pmKnoxville McGhee Tyson
7h 09m
1 stop
SEA12:31 amSeattle/Tacoma Intl
Oct 19
SEA8:34 pmSeattle/Tacoma Intl
20h 03m
1 stop
TYS7:37 pmKnoxville McGhee Tyson
$285
Find similar

American Airlines flights from Knoxville to Seattle

Our best American Airlines deals on Knoxville to Seattle flight tickets
American Airlines
Dec 13
TYS6:18 pmKnoxville McGhee Tyson
7h 47m
1 stop
SEA11:05 pmSeattle/Tacoma Intl
Dec 31
SEA1:22 amSeattle/Tacoma Intl
6h 32m
1 stop
TYS10:54 amKnoxville McGhee Tyson
$309
Find similar
American Airlines
Aug 18
TYS3:04 pmKnoxville McGhee Tyson
7h 58m
1 stop
SEA8:02 pmSeattle/Tacoma Intl
Aug 25
SEA11:59 pmSeattle/Tacoma Intl
10h 04m
1 stop
TYS1:03 pmKnoxville McGhee Tyson
$339
Find similar
American Airlines
Aug 18
TYS12:03 pmKnoxville McGhee Tyson
7h 45m
1 stop
SEA4:48 pmSeattle/Tacoma Intl
Aug 25
SEA11:59 pmSeattle/Tacoma Intl
8h 23m
1 stop
TYS11:22 amKnoxville McGhee Tyson
$340
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 July 31, 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

Thu 8/21

8:36 pm-12:34 am

1 stop6h 58m

Seattle/Tacoma Intl

Sat 8/30

12:40 pm-7:41 pm

1 stop28h 01m

$265

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 8/28

8:36 pm-12:34 am

1 stop6h 58m

Seattle/Tacoma Intl

Thu 9/4

6:12 am-7:50 pm

1 stop10h 38m

$278

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 12/13

6:18 pm-11:05 pm

1 stop7h 47m

Seattle/Tacoma Intl

Wed 12/31

1:22 am-10:54 am

1 stop6h 32m

$309

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Fri 11/7

4:55 pm-9:13 pm

1 stop7h 18m

Seattle/Tacoma Intl

Sat 11/15

5:05 am-6:04 pm

2 stops9h 59m

$314

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 8/30

4:40 pm-9:17 pm

1 stop7h 37m

Seattle/Tacoma Intl

Sat 9/6

11:54 pm-10:13 am

1 stop7h 19m

$325

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Mon 8/18

3:04 pm-8:02 pm

1 stop7h 58m

Seattle/Tacoma Intl

Mon 8/25

11:59 pm-1:03 pm

1 stop10h 04m

$339

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 9/13

6:08 pm-11:54 pm

1 stop8h 46m

Seattle/Tacoma Intl

Sun 9/14

11:11 pm-11:41 am

1 stop9h 30m

$374

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Fri 10/3

5:45 am-10:09 am

1 stop7h 24m

Seattle/Tacoma Intl

Tue 10/7

9:55 pm-9:00 am

1 stop8h 05m

$398

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 10/4

4:37 pm-11:08 pm

1 stop9h 31m

Seattle/Tacoma Intl

Mon 10/6

12:59 am-11:45 am

1 stop7h 46m

$409

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sun 8/31

5:30 am-11:34 am

1 stop9h 04m

Seattle/Tacoma Intl

Fri 9/5

12:33 am-1:12 pm

1 stop9h 39m

$484

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 $558. If you don’t want to visit Seattle in August, then you should wait until October to fly from Knoxville, when ticket prices are also cheap, with an average price of $578.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Knoxville is on a Friday. momondo users have found tickets for Friday departures for as low as $596. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Knoxville because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $746.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Knoxville in the evening is the least expensive time of day to depart. momondo users have found prices as low as $327 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $697. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $652 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 $552 on momondo.

How have Knoxville to Seattle flight prices changed over time?

As of July 2025, prices for Knoxville to Seattle flights are approximately 69% 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

Best Price Found

$133

Fastest flight time

6h 55m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Knoxville in the past 72 hours is $133. The best round-trip flight deal from Knoxville to Seattle found on momondo in the last 72 hours is $265.
The fastest flight from Knoxville to Seattle takes 6h 55m
There are no direct flights from Knoxville to Seattle. Popular non-direct route for this connection is Knoxville McGhee Tyson Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
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 6h 55m, 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 $178Free CancellationRating
5.9
3,239 reviews
Search Frontier flights
American AirlinesPriceFrom $363Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $408Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $438Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights

Traveling to a place near Seattle?

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

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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