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$130+ 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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — TYS
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Knoxville McGhee Tyson are usually found in April or May, 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 July 3, 2025.

Round-trip from

$166
(Priceline)

One-way from

$130
(Priceline)

Popular in

January

Cheapest in

April

Average price

$590
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. 13% potential increase in price ($100 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 July 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 July 3, 2025.

This Priceline deal was found by Cheapflights users on 7/3. 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.
Mon 10/206:00 amSEA - TYS
1 stop10h 37mFrontier
Thu 10/238:22 pmTYS - SEA
1 stop7h 09mFrontier
Deal found 7/3$166
This American Airlines deal was found by Cheapflights users on 7/3. 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 10/211:38 pmSEA - TYS
1 stop7h 18mAmerican Airlines
Mon 10/65:37 pmTYS - SEA
1 stop9h 50mAmerican Airlines
Deal found 7/3$309
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 10/2411:40 pmSEA - TYS
1 stop7h 30mUnited Airlines
Tue 11/47:00 amTYS - SEA
2 stops9h 54mUnited Airlines
Deal found 7/2$332
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:00 amSEA - TYS
1 stop9h 22mDelta
Sun 9/76:36 amTYS - SEA
1 stop7h 09mDelta
Deal found 7/1$364
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/295:30 pmSEA - TYS
2 stops15h 20mMultiple Airlines
Tue 8/54:55 pmTYS - SEA
3 stops26h 30mMultiple Airlines
Deal found 7/1$406
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1212:33 amSEA - TYS
1 stop9h 39mAlaska Airlines
Sat 9/277:29 amTYS - SEA
1 stop10h 46mAlaska Airlines
Deal found 7/1$409

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 July 3, 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 10/20

6:00 am-7:37 pm

1 stop10h 37m

Knoxville McGhee Tyson

Thu 10/23

8:22 pm-12:31 am

1 stop7h 09m

$166

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 10/2

11:38 pm-9:56 am

1 stop7h 18m

Knoxville McGhee Tyson

Mon 10/6

5:37 pm-12:27 am

1 stop9h 50m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 10/24

11:40 pm-10:10 am

1 stop7h 30m

Knoxville McGhee Tyson

Tue 11/4

7:00 am-1:54 pm

2 stops9h 54m

$332

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 8/29

6:00 am-6:22 pm

1 stop9h 22m

Knoxville McGhee Tyson

Sun 9/7

6:36 am-10:45 am

1 stop7h 09m

$364

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 7/29

5:30 pm-11:50 am

2 stops15h 20m

Knoxville McGhee Tyson

Tue 8/5

4:55 pm-4:25 pm

3 stops26h 30m

$406

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 9/12

12:33 am-1:12 pm

1 stop9h 39m

Knoxville McGhee Tyson

Sat 9/27

7:29 am-3:15 pm

1 stop10h 46m

$409

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sun 7/13

6:25 am-4:29 pm

1 stop7h 04m

$130

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 7/22

5:30 pm-11:50 am

2 stops15h 20m

$188

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 9/2

11:15 pm-11:34 am

1 stop9h 19m

$231

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 8/20

6:25 am-7:53 pm

2 stops10h 28m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 12 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 June 27, 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 $296). 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 July 3, 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 July 3, 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

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,970 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,845 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Frontier
5.9
Fair
3,284 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

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.

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

    Cheapflights users have booked flights from Seattle to Knoxville round-trip from $166. Other airlines that can offer you cheap pricing are American Airlines, from $309, and United Airlines, from $332. Users have found that Frontier is 74% cheaper than the other options available to this destination.

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

    $130 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $231 and $274, 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, January is the cheapest month in which you can book a flight from Seattle to Knoxville (average of $296). 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 Seattle?

Book flights to Seattle 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$164Average$238FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$346Average$625FlexibilityNo cancel feeOn-time71%
DeltaCheapest$456Average$667FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$460Average$658FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$483Average$723FlexibilityNo cancel feeOn-time75%

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