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$114+ Cheap flights from Seattle to Knoxville (SEA - TYS)

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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TYS
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Knoxville McGhee Tyson are usually found in August or September, booked 42 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap flight deals from Seattle to Knoxville

Cheapest flights from Seattle to Knoxville
Explore the most affordable flight options available from Seattle to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/272:54 pmSEA - TYS
1 stop19h 17mMultiple Airlines
Tue 12/304:46 pmTYS - SEA
1 stop22h 44mMultiple Airlines
Deal found 12/20$538
This Kiwi.com deal was found by Cheapflights users on 12/19. 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 12/201:31 pmSEA - TYS
2 stops20h 40mMultiple Airlines
Wed 12/241:58 pmTYS - SEA
1 stop25h 32mMultiple Airlines
Deal found 12/19$618
This Kiwi.com deal was found by Cheapflights users on 12/19. 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.
Sun 12/282:54 pmSEA - TYS
1 stop21h 57mFrontier
Tue 12/304:46 pmTYS - SEA
1 stop22h 44mFrontier
Deal found 12/19$637
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Sun 12/211:25 pmSEA - TYS
2 stops23h 26mFrontier
Tue 12/234:46 pmTYS - SEA
1 stop22h 44mFrontier
Deal found 12/20$677
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Sun 12/216:05 pmSEA - TYS
1 stop19h 57mMultiple Airlines
Tue 12/234:46 pmTYS - SEA
1 stop22h 44mMultiple Airlines
Deal found 12/20$704
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
Tue 12/232:54 pmSEA - TYS
1 stop26h 45mMultiple Airlines
Wed 12/311:58 pmTYS - SEA
1 stop25h 32mMultiple Airlines
Deal found 12/20$734
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/272:54 pmSEA - TYS
1 stop21h 37mFrontier
Tue 12/304:46 pmTYS - SEA
2 stops34h 56mFrontier
Deal found 12/20$736
This Kiwi.com deal was found by Cheapflights users on 12/19. 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 12/202:54 pmSEA - TYS
1 stop19h 17mMultiple Airlines
Sat 1/312:21 pmTYS - SEA
2 stops28h 33mMultiple Airlines
Deal found 12/19$763
This American Airlines deal was found by Cheapflights users on 12/20. 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.
Thu 12/2512:14 amSEA - TYS
1 stop7h 36mAmerican Airlines
Mon 12/294:12 pmTYS - SEA
1 stop7h 58mAmerican Airlines
Deal found 12/20$837
This Kiwi.com deal was found by Cheapflights users on 12/19. 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.
Sun 12/282:54 pmSEA - TYS
2 stops16h 21mMultiple Airlines
Tue 12/304:46 pmTYS - SEA
1 stop22h 44mMultiple Airlines
Deal found 12/19$855

Find flight deals from Seattle to Knoxville

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Knoxville (TYS). 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 December 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$335
(American Airlines)

One-way from

$114
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$543
Provider with most accurate pricing for Seattle/Tacoma Intl-Knoxville McGhee Tyson flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Knoxville McGhee Tyson flights.
Search Deals
From Seattle/Tacoma Intl to Knoxville McGhee Tyson
Search Deals
One-way flight from Seattle/Tacoma Intl to Knoxville McGhee Tyson
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Knoxville 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 December 21, 2025.
Use the filters below to find and compare flights from Seattle to Knoxville that are best for you.

Fly from

Seattle

Fly to

Knoxville

Route

Depart

Return

Price

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 1/14

7:00 am-4:49 pm

1 stop6h 49m

Knoxville McGhee Tyson

Wed 1/28

12:17 pm-7:04 pm

1 stop9h 47m

$359

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 1/22

7:00 am-6:05 pm

1 stop8h 05m

Knoxville McGhee Tyson

Mon 1/26

4:55 pm-10:59 pm

1 stop9h 04m

$385

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 1/22

6:00 am-5:42 pm

1 stop8h 42m

Knoxville McGhee Tyson

Thu 1/29

4:41 pm-9:59 pm

1 stop8h 18m

$385

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 2/14

11:59 pm-10:19 am

1 stop7h 20m

Knoxville McGhee Tyson

Sat 2/21

6:45 am-11:49 am

1 stop8h 04m

$385

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 1/21

10:50 am-10:47 pm

1 stop8h 57m

Knoxville McGhee Tyson

Fri 2/6

4:41 pm-11:51 pm

1 stop10h 10m

$398

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 1/21

9:00 am-10:31 pm

2 stops10h 31m

Knoxville McGhee Tyson

Fri 2/6

6:45 am-11:32 am

1 stop7h 47m

$403

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 1/29

8:10 am-7:27 pm

1 stop8h 17m

Knoxville McGhee Tyson

Sun 2/1

6:45 am-11:32 am

1 stop7h 47m

$411

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 1/23

8:04 am-10:09 pm

1 stop11h 05m

Knoxville McGhee Tyson

Sun 1/25

4:41 pm-11:51 pm

1 stop10h 10m

$430

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 1/23

7:00 am-4:53 pm

1 stop6h 53m

Knoxville McGhee Tyson

Sun 1/25

6:45 am-3:44 pm

2 stops11h 59m

$442

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 1/7

7:35 am-5:42 pm

1 stop7h 07m

Knoxville McGhee Tyson

Wed 1/21

6:00 am-11:01 am

1 stop8h 01m

$458

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 18 results
1
2

Compare providers for flights from Seattle to Knoxville

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 Seattle to Knoxville in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 Seattle-Knoxville flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Knoxville flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Knoxville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Knoxville 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 Seattle-Knoxville 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 Seattle to Knoxville

Have a flexible travel schedule? Discover the best time to fly to Knoxville from Seattle 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 Seattle to Knoxville

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Knoxville. Price data was last updated on December 19, 2025.

The price you pay for your flight from Seattle to Knoxville may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, March is the cheapest month in which you can book a flight from Seattle to Knoxville (average of $221). Flying from Seattle to Knoxville in December is currently the most expensive (average of $346). 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 SEA to TYS?

Find hourly flight availability from Seattle to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 21, 2025.

It’s optimal to fly from Seattle to Knoxville in the afternoon. By choosing this option you can save up to 71% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Knoxville

Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated December 21, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Seattle to Knoxville have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,494 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,494 reviews
Alaska Airlines
8.0
Very good
11,494 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,017 reviews
Alaska Airlines
8.0
Very good
11,494 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
9,099 reviews
Alaska Airlines
8.0
Very good
11,494 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
11,050 reviews
Alaska Airlines
8.0
Very good
11,494 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Frontier
5.8
Fair
3,082 reviews
Alaska Airlines
8.0
Very good
11,494 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Knoxville. 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 Seattle to Knoxville?

    A quick flight from Seattle to Knoxville can take about 6h 49m. American Airlines provides one of the quickest options available for as low as $359. Airlines will cover a distance of 2109 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Seattle to Knoxville round-trip from $190. Other airlines that can offer you cheap pricing are American Airlines, from $308, and Delta, from $358. Users have found that Frontier is 67% cheaper than the other options available to this destination.

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

    $218 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $218 and $228, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Knoxville 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 Seattle to Knoxville?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Knoxville (average of $221). Flying from Seattle to Knoxville in December is currently the most expensive (average of $346). 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 Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee
Crossville
Corbin
Morristown
Bryson City
Alcoa
Oak Ridge
Murphy

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Top 5 airlines flying from Seattle to Knoxville

Discover the top 5 airlines that operate flights from Seattle to Knoxville. 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 December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$190Average$280FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$315Average$537FlexibilityNo cancel feeOn-time71%
DeltaCheapest$358Average$625FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$436Average$639FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$483Average$776FlexibilityNo cancel feeOn-time75%

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