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$102+ 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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SEA
ene. 2 — ene. 91
vie. 1/2
vie. 1/9
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to Seattle/Tacoma Intl are usually found in August or November, booked 44 days in advance, depart on a Friday or Tuesday and return on a Tuesday

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 diciembre 3, 2025.

This Mytrip deal was found by Cheapflights users on 12/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/114:52 pmTYS - SEA
1 stop22h 01mFrontier
sáb. 1/102:49 pmSEA - TYS
1 stop21h 39mFrontier
Deal found 12/2$212
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
jue. 12/116:30 amTYS - SEA
2 stops30h 36mMultiple Airlines
sáb. 1/102:49 pmSEA - TYS
1 stop21h 39mMultiple Airlines
Deal found 12/1$283
This Kiwi.com deal was found by Cheapflights users on 12/2. 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.
jue. 12/114:52 pmTYS - SEA
1 stop22h 01mFrontier
vie. 1/99:02 pmSEA - TYS
2 stops39h 26mFrontier
Deal found 12/2$298
This Kiwi.com deal was found by Cheapflights users on 11/30. 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.
dom. 12/76:30 amTYS - SEA
2 stops37h 06mMultiple Airlines
sáb. 12/135:21 pmSEA - TYS
1 stop26h 01mMultiple Airlines
Deal found 11/30$333
This Gotogate deal was found by Cheapflights users on 12/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/44:52 pmTYS - SEA
1 stop22h 01mFrontier
dom. 12/712:48 pmSEA - TYS
1 stop24h 09mFrontier
Deal found 12/2$347
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
dom. 12/214:26 pmTYS - SEA
2 stops24h 28mMultiple Airlines
sáb. 1/36:12 pmSEA - TYS
1 stop25h 10mMultiple Airlines
Deal found 12/1$401
This United Airlines deal was found by Cheapflights users on 12/2. 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.
mar. 12/234:04 pmTYS - SEA
1 stop10h 08mUnited Airlines
mar. 1/278:10 amSEA - TYS
1 stop8h 17mUnited Airlines
Deal found 12/2$481
This United Airlines deal was found by Cheapflights users on 12/2. 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.
jue. 12/117:00 amTYS - SEA
1 stop7h 45mUnited Airlines
vie. 1/98:10 amSEA - TYS
1 stop8h 17mUnited Airlines
Deal found 12/2$487

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 diciembre 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$280
(American Airlines)

One-way from

$102
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$751
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.
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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. 5% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 diciembre 3, 2025.
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

jue. 12/11

4:52 pm-11:53 am

1 stop22h 01m

Seattle/Tacoma Intl

vie. 1/9

9:02 pm-3:28 pm

2 stops39h 26m

$298

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

vie. 1/16

5:40 am-10:09 am

1 stop7h 29m

Seattle/Tacoma Intl

vie. 1/23

11:10 pm-12:13 pm

1 stop10h 03m

$325

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

dom. 12/7

6:30 am-4:36 pm

2 stops37h 06m

Seattle/Tacoma Intl

sáb. 12/13

5:21 pm-10:22 pm

1 stop26h 01m

$333

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

lun. 1/5

6:09 pm-10:50 pm

1 stop7h 41m

Seattle/Tacoma Intl

mié. 1/7

12:00 pm-11:09 pm

1 stop8h 09m

$350

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

vie. 1/16

7:35 am-7:51 pm

1 stop15h 16m

Seattle/Tacoma Intl

vie. 1/23

10:51 am-11:09 am

2 stops21h 18m

$353

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jue. 1/29

4:55 pm-10:59 pm

1 stop9h 04m

Seattle/Tacoma Intl

lun. 2/2

7:00 am-4:53 pm

1 stop6h 53m

$357

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jue. 2/19

2:21 pm-8:56 pm

1 stop9h 35m

Seattle/Tacoma Intl

lun. 2/23

11:59 pm-10:12 am

1 stop7h 13m

$357

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jue. 1/15

6:30 am-10:55 am

1 stop7h 25m

Seattle/Tacoma Intl

dom. 1/18

6:15 am-11:45 pm

1 stop14h 30m

$365

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

vie. 1/16

6:45 am-11:32 am

1 stop7h 47m

Seattle/Tacoma Intl

vie. 1/23

9:00 am-10:31 pm

2 stops10h 31m

$375

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

mié. 2/4

11:10 am-7:55 pm

2 stops11h 45m

Seattle/Tacoma Intl

dom. 2/8

8:10 am-10:57 am

1 stop23h 47m

$404

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 19 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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Knoxville-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 28, 2025.

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 $172). Flying from Knoxville to Seattle in May is currently the most expensive (average of $327). 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.

What is the cheapest time of day to fly from TYS to SEA?

Find hourly flight availability from Knoxville to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 3, 2025.

It’s typically best to fly out from Knoxville to Seattle in the evening. Doing so could potentially save you 53% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Knoxville to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Knoxville to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Knoxville to Seattle flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 diciembre 3, 2025.
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
8,011 reviews

Food

7.3

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Boarding

8.1

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
8,011 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Boarding

8.1

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
9,063 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Boarding

8.1

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
11,045 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Boarding

8.1

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
5.8
Fair
3,092 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Crew

8.5

Overall

7.9

Entertainment

7.9

Comfort

7.9

Boarding

8.1

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 7h 29m. Frontier provides one of the quickest options available for as low as $325. 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 ($248), Delta ($318), and American Airlines ($342) offers the cheapest pricing from Knoxville to Seattle. These flights start at 59% 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 Delta 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 $172). Flying from Knoxville to Seattle in May is currently the most expensive (average of $327). 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
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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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 diciembre 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$248Average$330FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$333Average$604FlexibilityNo cancel feeOn-time71%
DeltaCheapest$368Average$617FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$397Average$649FlexibilityNo cancel feeOn-time69%

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