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Knoxville

$175+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TYS
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
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 July, booked 35 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap 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 septiembre 16, 2025.

Round-trip from

$245
(Kiwi.com)

One-way from

$175
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$581
From Seattle/Tacoma Intl to Knoxville McGhee Tyson
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One-way flight from Seattle/Tacoma Intl to Knoxville McGhee Tyson
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Highest demand for flights based on searches. 15% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 septiembre 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
sáb. 10/188:43 pmSEA - TYS
1 stop19h 49mFrontier
jue. 10/238:17 pmTYS - SEA
1 stop14h 16mFrontier
Deal found 9/14$245
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
sáb. 10/188:43 pmSEA - TYS
1 stop19h 49mMultiple Airlines
jue. 10/235:34 pmTYS - SEA
2 stops16h 59mMultiple Airlines
Deal found 9/14$250
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/26:12 amSEA - TYS
1 stop10h 38mFrontier
dom. 10/55:08 pmTYS - SEA
1 stop10h 22mFrontier
Deal found 9/15$266
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
sáb. 10/47:00 amSEA - TYS
1 stop30h 18mFrontier
vie. 10/108:17 pmTYS - SEA
1 stop18h 50mFrontier
Deal found 9/16$311
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
sáb. 9/277:00 amSEA - TYS
1 stop30h 18mMultiple Airlines
dom. 10/55:44 pmTYS - SEA
2 stops45h 23mMultiple Airlines
Deal found 9/15$312
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
sáb. 10/47:00 amSEA - TYS
1 stop30h 18mMultiple Airlines
vie. 10/1010:44 amTYS - SEA
2 stops47h 49mMultiple Airlines
Deal found 9/16$338
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
sáb. 10/188:43 pmSEA - TYS
1 stop19h 49mMultiple Airlines
mié. 10/223:19 pmTYS - SEA
2 stops23h 48mMultiple Airlines
Deal found 9/15$343
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
vie. 10/319:22 pmSEA - TYS
2 stops38h 11mMultiple Airlines
vie. 11/77:55 amTYS - SEA
1 stop13h 37mMultiple Airlines
Deal found 9/16$354
This American Airlines deal was found by Cheapflights users on 9/13. 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.
lun. 10/2712:34 amSEA - TYS
1 stop12h 37mAmerican Airlines
sáb. 11/13:03 pmTYS - SEA
1 stop11h 51mAmerican Airlines
Deal found 9/13$387
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
lun. 10/66:12 amSEA - TYS
1 stop10h 33mMultiple Airlines
sáb. 10/117:10 amTYS - SEA
2 stops27h 23mMultiple Airlines
Deal found 9/15$395
This Kiwi.com deal was found by Cheapflights users on 9/15. 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. 10/128:43 pmSEA - TYS
1 stop19h 49mFrontier
jue. 10/168:17 pmTYS - SEA
1 stop14h 16mFrontier
Deal found 9/15$403

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 septiembre 16, 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

jue. 10/2

6:12 am-7:50 pm

1 stop10h 38m

Knoxville McGhee Tyson

dom. 10/5

5:08 pm-12:30 am

1 stop10h 22m

$266

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

sáb. 9/27

7:00 am-4:18 pm

1 stop30h 18m

Knoxville McGhee Tyson

dom. 10/5

5:44 pm-12:07 pm

2 stops45h 23m

$312

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

lun. 10/27

12:34 am-4:11 pm

1 stop12h 37m

Knoxville McGhee Tyson

sáb. 11/1

3:03 pm-11:54 pm

1 stop11h 51m

$387

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

sáb. 9/27

7:00 am-4:18 pm

1 stop30h 18m

Knoxville McGhee Tyson

dom. 10/5

5:08 pm-12:30 am

1 stop10h 22m

$407

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

lun. 10/27

11:56 pm-9:52 am

1 stop6h 56m

Knoxville McGhee Tyson

lun. 11/10

5:10 am-1:10 pm

1 stop11h 00m

$437

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

vie. 10/17

12:34 am-12:31 pm

1 stop8h 57m

Knoxville McGhee Tyson

mié. 10/22

5:00 am-11:30 am

1 stop9h 30m

$437

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

mar. 11/18

12:41 am-11:16 am

1 stop7h 35m

Knoxville McGhee Tyson

dom. 11/23

5:10 am-10:44 am

1 stop8h 34m

$437

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

mié. 11/5

12:59 am-11:16 am

1 stop7h 17m

Knoxville McGhee Tyson

lun. 11/10

5:10 am-10:44 am

1 stop8h 34m

$437

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

mar. 10/28

11:59 pm-10:05 am

1 stop7h 06m

Knoxville McGhee Tyson

sáb. 11/1

8:26 am-6:00 pm

2 stops12h 34m

$442

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

jue. 10/23

1:02 pm-2:19 pm

2 stops22h 17m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 18 results
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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 September 12, 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 35 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, January is the cheapest month in which you can book a flight from Seattle to Knoxville (average of $295). Flying from Seattle to Knoxville in March is currently the most expensive (average of $376). 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 septiembre 16, 2025.

It’s optimal to fly from Seattle to Knoxville in the afternoon. By choosing this option you can save up to 72% 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 septiembre 16, 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
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Frontier
5.8
Fair
3,174 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 10h 38m. Frontier provides one of the quickest options available for as low as $266. 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 $332, and United Airlines, from $455. Users have found that Frontier is 69% cheaper than the other options available to this destination.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Knoxville (average of $295). Flying from Seattle to Knoxville in March is currently the most expensive (average of $376). 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
Morristown
Cherokee
Corbin
Alcoa
Oak Ridge
Murphy

Browse thousands of different options on Cheapflights for your next trip

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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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$190Average$280FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$332Average$583FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$455Average$650FlexibilityNo cancel feeOn-time69%
DeltaCheapest$456Average$659FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$483Average$776FlexibilityNo cancel feeOn-time75%

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