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$112+ Cheap flights from Knoxville to Seattle (TYS - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SEA
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
1 adult, Economy
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Cheap flight deals from Knoxville to Seattle

Cheapest flights from Knoxville to Seattle
Explore the most affordable flight options available from Knoxville to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 11, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:59 pm
TYS
-
SEA
2 stops22h 28m
Multiple Airlines
Wed 4/226:57 pm
SEA
-
TYS
1 stop17h 36m
Multiple Airlines
Deal found 2/10$318
This Kiwi.com deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/234:28 pm
TYS
-
SEA
1 stop19h 59m
Multiple Airlines
Sun 4/269:35 pm
SEA
-
TYS
1 stop22h 16m
Multiple Airlines
Deal found 2/9$327
This CheapOair deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:28 pm
TYS
-
SEA
1 stop25h 37m
Frontier
Sat 5/166:57 pm
SEA
-
TYS
1 stop17h 36m
Frontier
Deal found 2/8$336
This Kiwi.com deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:28 pm
TYS
-
SEA
1 stop19h 59m
Multiple Airlines
Mon 5/119:35 pm
SEA
-
TYS
2 stops34h 01m
Multiple Airlines
Deal found 2/9$345
This Kiwi.com deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:28 pm
TYS
-
SEA
1 stop19h 59m
Multiple Airlines
Sat 5/1610:42 am
SEA
-
TYS
2 stops31h 32m
Multiple Airlines
Deal found 2/8$346
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:00 am
TYS
-
SEA
1 stop7h 49m
United Airlines
Tue 3/177:00 am
SEA
-
TYS
1 stop6h 45m
United Airlines
Deal found 2/9$359
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:40 am
TYS
-
SEA
1 stop9h 38m
Delta
Tue 3/1711:15 pm
SEA
-
TYS
1 stop8h 16m
Delta
Deal found 2/9$369
This American Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:42 am
TYS
-
SEA
1 stop14h 22m
American Airlines
Tue 3/177:21 am
SEA
-
TYS
1 stop11h 03m
American Airlines
Deal found 2/8$375
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/96:38 pm
TYS
-
SEA
1 stop8h 17m
Delta
Tue 3/1711:15 pm
SEA
-
TYS
1 stop8h 16m
Delta
Deal found 2/9$382

Find flight deals from Knoxville to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(Kiwi.com)

One-way from

$112
(CheapOair)

Popular in

December

Cheapest in

August

Average price

$498
Provider with most accurate pricing for Knoxville McGhee Tyson-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Seattle/Tacoma Intl flights.
Search Deals
From Knoxville McGhee Tyson to Seattle/Tacoma Intl
Search Deals
One-way flight from Knoxville McGhee Tyson to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated February 11, 2026.
Use the filters below to find and compare flights from Knoxville to Seattle that are best for you.

Fly from

Knoxville

Fly to

Seattle

Route

Depart

Return

Price

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 5/7

4:28 pm-9:27 am

1 stop19h 59m

Seattle/Tacoma Intl

Sat 5/16

6:57 pm-3:33 pm

1 stop17h 36m

$336

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 5/7

4:28 pm-9:27 am

1 stop19h 59m

Seattle/Tacoma Intl

Sat 5/16

10:42 am-9:14 pm

2 stops31h 32m

$346

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 4/25

6:00 am-3:51 pm

1 stop12h 51m

Seattle/Tacoma Intl

Sat 5/2

10:25 am-11:56 pm

1 stop10h 31m

$359

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 4/23

4:28 pm-9:27 am

1 stop19h 59m

Seattle/Tacoma Intl

Sun 4/26

6:57 pm-5:30 pm

2 stops19h 33m

$360

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Tue 3/10

7:40 am-2:18 pm

1 stop9h 38m

Seattle/Tacoma Intl

Tue 3/17

11:15 pm-10:31 am

1 stop8h 16m

$369

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 3/11

11:42 am-11:04 pm

1 stop14h 22m

Seattle/Tacoma Intl

Tue 3/17

7:21 am-9:24 pm

1 stop11h 03m

$375

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Tue 3/10

7:00 am-1:46 pm

2 stops9h 46m

Seattle/Tacoma Intl

Tue 3/17

7:00 am-4:45 pm

1 stop6h 45m

$380

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Mon 3/9

6:38 pm-11:55 pm

1 stop8h 17m

Seattle/Tacoma Intl

Tue 3/17

11:15 pm-10:31 am

1 stop8h 16m

$382

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 4/18

7:00 am-11:48 am

1 stop7h 48m

Seattle/Tacoma Intl

Wed 4/22

5:00 am-3:06 pm

1 stop7h 06m

$385

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 3/18

4:29 pm-11:09 pm

1 stop9h 40m

Seattle/Tacoma Intl

Wed 3/25

5:30 am-5:31 pm

1 stop9h 01m

$385

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

Showing 1-10 of 21 results
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Compare providers for flights from Knoxville to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Seattle in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Knoxville to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Seattle. Price data was last updated on February 6, 2026.

The best time to book flights from Knoxville to Seattle is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Knoxville to Seattle?

Currently, April is the cheapest month in which you can book a flight from Knoxville to Seattle (average of $158). Flying from Knoxville to Seattle in May is currently the most expensive (average of $323). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated February 11, 2026.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Knoxville to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,180 reviews

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,180 reviews
Delta
7.9
Good
8,180 reviews

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,273 reviews
Delta
7.9
Good
8,180 reviews

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,265 reviews
Delta
7.9
Good
8,180 reviews

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.7
Fair
3,052 reviews
Delta
7.9
Good
8,180 reviews

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Knoxville to Seattle?

    A quick flight from Knoxville to Seattle can take about 12h 51m. Frontier provides one of the quickest options available for as low as $359. There are 2109 mi between Knoxville and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Knoxville to Seattle round-trip?

    According to our current data, Frontier ($179), American Airlines ($312), and Delta ($368) offers the cheapest pricing from Knoxville to Seattle. These flights start at 67% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Knoxville to Seattle one-way?

    One-way options have recently been found by users for as low as $93 on Frontier. Other airlines that offer cheap prices include American Airlines from $218 and United Airlines from $218 one-way.

  • Can I find deals for flights from Knoxville to Seattle that include hotel bookings?

    Yes. In addition to deals on Knoxville to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Seattle.

  • Can I find deals for business class flights from Knoxville to Seattle?

    Yes. Cheapflights offers flight deals from Knoxville to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Seattle?

    Currently, April is the cheapest month in which you can book a flight from Knoxville to Seattle (average of $158). Flying from Knoxville to Seattle in May is currently the most expensive (average of $323). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

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

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Top 4 airlines flying from Knoxville to Seattle

Discover the top 4 airlines that operate flights from Knoxville to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$179Average$278FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$312Average$571FlexibilityNo cancel feeOn-time71%
DeltaCheapest$368Average$576FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$382Average$542FlexibilityNo cancel feeOn-time69%

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