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$84+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TYS
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Knoxville McGhee Tyson are usually found in July or August, booked 6 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 August 20, 2025.

Round-trip from

$210
(FlightHub)

One-way from

$84
(Priceline)

Popular in

January

Cheapest in

July

Average price

$548
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. 14% potential increase in price ($109 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 20, 2025.

This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/226:12 amSEA - TYS
1 stop10h 33mFrontier
Thu 9/258:40 pmTYS - SEA
1 stop6h 50mFrontier
Deal found 8/18$210
This Priceline deal was found by Cheapflights users on 8/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:12 amSEA - TYS
1 stop10h 38mFrontier
Thu 9/258:40 pmTYS - SEA
1 stop6h 50mFrontier
Deal found 8/19$249
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:12 amSEA - TYS
1 stop10h 38mFrontier
Fri 10/178:17 pmTYS - SEA
1 stop18h 50mFrontier
Deal found 8/17$253
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:12 amSEA - TYS
1 stop10h 38mFrontier
Mon 10/68:35 pmTYS - SEA
1 stop18h 32mFrontier
Deal found 8/17$267
This American Airlines deal was found by Cheapflights users on 8/18. 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.
Tue 9/911:38 pmSEA - TYS
1 stop7h 18mAmerican Airlines
Fri 9/193:13 pmTYS - SEA
1 stop7h 56mAmerican Airlines
Deal found 8/18$309
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 10/47:00 amSEA - TYS
1 stop27h 33mMultiple Airlines
Mon 10/1310:12 pmTYS - SEA
2 stops40h 55mMultiple Airlines
Deal found 8/18$315
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/95:02 amSEA - TYS
2 stops10h 08mUnited Airlines
Sat 9/137:00 amTYS - SEA
1 stop7h 31mUnited Airlines
Deal found 8/18$327
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/114:36 pmSEA - TYS
2 stops21h 58mMultiple Airlines
Sun 9/147:00 amTYS - SEA
1 stop20h 30mMultiple Airlines
Deal found 8/18$328
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Thu 9/1810:10 amSEA - TYS
2 stops33h 20mMultiple Airlines
Thu 9/257:00 amTYS - SEA
1 stop20h 30mMultiple Airlines
Deal found 8/19$333

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 August 20, 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

Mon 9/22

6:12 am-7:45 pm

1 stop10h 33m

Knoxville McGhee Tyson

Thu 9/25

8:40 pm-12:30 am

1 stop6h 50m

$210

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 9/18

6:12 am-7:50 pm

1 stop10h 38m

Knoxville McGhee Tyson

Thu 9/25

8:40 pm-12:30 am

1 stop6h 50m

$249

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 9/18

6:12 am-7:50 pm

1 stop10h 38m

Knoxville McGhee Tyson

Fri 10/17

8:17 pm-12:07 pm

1 stop18h 50m

$253

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 10/2

6:12 am-7:50 pm

1 stop10h 38m

Knoxville McGhee Tyson

Mon 10/6

8:35 pm-12:07 pm

1 stop18h 32m

$267

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 9/9

11:38 pm-9:56 am

1 stop7h 18m

Knoxville McGhee Tyson

Fri 9/19

3:13 pm-8:09 pm

1 stop7h 56m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 10/18

6:00 am-6:23 pm

1 stop9h 23m

Knoxville McGhee Tyson

Tue 10/21

5:44 am-10:14 am

1 stop7h 30m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 10/18

11:56 pm-10:31 am

1 stop7h 35m

Knoxville McGhee Tyson

Tue 10/21

2:00 pm-10:16 pm

1 stop11h 16m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sun 10/26

9:55 pm-9:00 am

1 stop8h 05m

Knoxville McGhee Tyson

Sat 11/1

6:40 am-12:58 pm

1 stop9h 18m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 11/4

12:59 am-11:23 am

1 stop7h 24m

Knoxville McGhee Tyson

Tue 11/11

6:18 pm-11:24 pm

1 stop8h 06m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Mon 9/8

6:12 am-7:45 pm

1 stop10h 33m

$84

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 20 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 August 8, 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 6 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 August 20, 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 August 20, 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

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

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

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

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
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

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
8,928 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

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

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

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
3,207 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Comfort

7.8

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 33m. Frontier provides one of the quickest options available for as low as $210. Airlines will cover a distance of 2109 mi.

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

    Cheapflights users have booked flights from Seattle to Knoxville round-trip from $209. Other airlines that can offer you cheap pricing are American Airlines, from $352, and United Airlines, from $455. Users have found that Frontier is 66% 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

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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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$209Average$290FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$352Average$604FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$455Average$685FlexibilityNo cancel feeOn-time69%
DeltaCheapest$456Average$667FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$483Average$723FlexibilityNo cancel feeOn-time75%

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