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Cheap flights from Knoxville to Seattle from $137

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 6/8. 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
1 adult, Economy, 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.
Frontier Logo
4:28 pm - 9:52 am
TYS
-
SEA
20h 24m
1 stop
Frontier Logo
7:12 pm - 3:33 pm
SEA
-
TYS
17h 21m
1 stop
$236Frontier
jeu., avr. 16 - sam., avr. 25
Frontier Logo
4:28 pm - 3:05 pm
TYS
-
SEA
25h 37m
1 stop
Frontier Logo
7:50 pm - 7:33 pm
SEA
-
TYS
20h 43m
1 stop
$281Frontier
jeu., avr. 30 - jeu., mai 7
Frontier Logo
8:32 pm - 9:49 am
TYS
-
SEA
16h 17m
1 stop
Frontier Logo
7:50 pm - 7:33 pm
SEA
-
TYS
20h 43m
1 stop
$322Frontier
ven., mai 8 - dim., mai 10
Multiple Airlines Logo
1:15 pm - 9:27 am
TYS
-
SEA
23h 12m
2 stops
Multiple Airlines Logo
7:50 pm - 1:59 pm
SEA
-
TYS
15h 09m
1 stop
$336Multiple Airlines
ven., avr. 24 - mer., mai 27
Multiple Airlines Logo
4:28 pm - 9:52 am
TYS
-
SEA
20h 24m
1 stop
Multiple Airlines Logo
7:12 pm - 12:24 pm
SEA
-
TYS
14h 12m
2 stops
$348Multiple Airlines
jeu., avr. 30 - sam., mai 2
Frontier Logo
4:28 pm - 9:52 am
TYS
-
SEA
20h 24m
1 stop
Frontier Logo
7:12 pm - 3:33 pm
SEA
-
TYS
17h 21m
1 stop
$358Frontier
jeu., avr. 30 - sam., mai 2
Multiple Airlines Logo
4:28 pm - 9:52 am
TYS
-
SEA
20h 24m
1 stop
Multiple Airlines Logo
7:12 pm - 6:03 pm
SEA
-
TYS
19h 51m
2 stops
$359Multiple Airlines
jeu., avr. 30 - ven., mai 1
Frontier Logo
8:32 pm - 10:06 am
TYS
-
SEA
16h 34m
1 stop
Frontier Logo
7:41 pm - 7:37 pm
SEA
-
TYS
20h 56m
1 stop
$362Frontier
ven., juin 5 - mar., juin 9
Multiple Airlines Logo
4:28 pm - 9:52 am
TYS
-
SEA
20h 24m
1 stop
Multiple Airlines Logo
7:12 pm - 10:24 pm
SEA
-
TYS
24h 12m
2 stops
$364Multiple Airlines
jeu., avr. 30 - dim., mai 3
Multiple Airlines Logo
4:28 pm - 9:52 am
TYS
-
SEA
20h 24m
1 stop
Multiple Airlines Logo
7:50 pm - 12:24 pm
SEA
-
TYS
37h 34m
2 stops
$365Multiple Airlines
jeu., avr. 30 - mar., mai 5

Delta flights from Knoxville to Seattle

Our best Delta deals on Knoxville to Seattle flight tickets
Delta
Apr 29
TYS6:15 amKnoxville McGhee Tyson
9h 00m
1 stop
SEA12:15 pmSeattle/Tacoma Intl
May 5
SEA11:14 pmSeattle/Tacoma Intl
8h 07m
1 stop
TYS10:21 amKnoxville McGhee Tyson
$438
Delta
May 1
TYS5:24 pmKnoxville McGhee Tyson
7h 26m
1 stop
SEA9:50 pmSeattle/Tacoma Intl
May 4
SEA11:15 pmSeattle/Tacoma Intl
7h 07m
1 stop
TYS9:22 amKnoxville McGhee Tyson
$446
Delta
Apr 28
TYS5:40 amKnoxville McGhee Tyson
8h 25m
1 stop
SEA11:05 amSeattle/Tacoma Intl
May 6
SEA4:05 pmSeattle/Tacoma Intl
14h 29m
1 stop
TYS9:34 amKnoxville McGhee Tyson
$459

Frontier flights from Knoxville to Seattle

Our best Frontier deals on Knoxville to Seattle flight tickets
Frontier
Apr 16
TYS4:28 pmKnoxville McGhee Tyson
20h 24m
1 stop
SEA9:52 amSeattle/Tacoma Intl
Apr 25
SEA7:12 pmSeattle/Tacoma Intl
17h 21m
1 stop
TYS3:33 pmKnoxville McGhee Tyson
$236
Frontier
Apr 30
TYS4:28 pmKnoxville McGhee Tyson
25h 37m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
May 7
SEA7:50 pmSeattle/Tacoma Intl
20h 43m
1 stop
TYS7:33 pmKnoxville McGhee Tyson
$281
Frontier
May 8
TYS8:32 pmKnoxville McGhee Tyson
16h 17m
1 stop
SEA9:49 amSeattle/Tacoma Intl
May 10
SEA7:50 pmSeattle/Tacoma Intl
20h 43m
1 stop
TYS7:33 pmKnoxville McGhee Tyson
$322

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 avril 2, 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

Cheapest round-trip

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jeu. 4/16

4:28 pm-9:52 am

1 stop20h 24m

Seattle/Tacoma Intl

sam. 4/25

7:12 pm-3:33 pm

1 stop17h 21m

$236

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jeu. 4/30

4:28 pm-3:05 pm

1 stop25h 37m

Seattle/Tacoma Intl

jeu. 5/7

7:50 pm-7:33 pm

1 stop20h 43m

$281

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

ven. 5/8

8:32 pm-9:49 am

1 stop16h 17m

Seattle/Tacoma Intl

dim. 5/10

7:50 pm-7:33 pm

1 stop20h 43m

$322

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

ven. 4/24

1:15 pm-9:27 am

2 stops23h 12m

Seattle/Tacoma Intl

mer. 5/27

7:50 pm-1:59 pm

1 stop15h 09m

$336
Quickest round-trip

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jeu. 4/30

4:28 pm-9:52 am

1 stop20h 24m

Seattle/Tacoma Intl

sam. 5/2

7:12 pm-12:24 pm

2 stops14h 12m

$348

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jeu. 4/30

4:28 pm-9:52 am

1 stop20h 24m

Seattle/Tacoma Intl

sam. 5/2

7:12 pm-3:33 pm

1 stop17h 21m

$358

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jeu. 4/30

4:28 pm-9:52 am

1 stop20h 24m

Seattle/Tacoma Intl

ven. 5/1

7:12 pm-6:03 pm

2 stops19h 51m

$359

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

ven. 6/5

8:32 pm-10:06 am

1 stop16h 34m

Seattle/Tacoma Intl

mar. 6/9

7:41 pm-7:37 pm

1 stop20h 56m

$362

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jeu. 4/30

4:28 pm-9:52 am

1 stop20h 24m

Seattle/Tacoma Intl

dim. 5/3

7:12 pm-10:24 pm

2 stops24h 12m

$364

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jeu. 4/30

4:28 pm-9:52 am

1 stop20h 24m

Seattle/Tacoma Intl

mar. 5/5

7:50 pm-12:24 pm

2 stops37h 34m

$365

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?

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 $415. 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 $545 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 $433 on momondo.

How have Knoxville to Seattle flight prices changed over time?

As of April 2026, prices for Knoxville to Seattle flights are approximately 13% 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 15m

Direct flights

None
The fastest flight from Knoxville to Seattle takes 7h 15m
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 15m, 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
3,004 reviews
Search Frontier flights
American AirlinesPriceFrom $308Free CancellationRating
7.1
11,549 reviews
Search American Airlines flights
DeltaPriceFrom $308Free CancellationRating
7.9
8,370 reviews
Search Delta flights
United AirlinesPriceFrom $371Free CancellationRating
7.4
9,533 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
Redmond
Marysville
Puyallup
Cle Elum
Lakewood
Tukwila
Federal Way
Centralia
Fife
Westport
Kirkland
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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sam. 5/2
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