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$136+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SEA
mar. 26 — abr. 21
mié. 3/26
mié. 4/2
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to Seattle/Tacoma Intl are usually found in October or September, booked 25 days in advance, depart on a Friday or Tuesday and return on a Tuesday

Cheap 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 marzo 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$275
(Mytrip)

One-way from

$136
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$626
Provider with most accurate pricing for Knoxville McGhee Tyson-Seattle/Tacoma Intl flight deals.
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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
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One-way flight from Knoxville McGhee Tyson to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 4% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find 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 marzo 21, 2025.

This Mytrip deal was found by Cheapflights users on 3/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/210:53 amTYS - SEA
2 stops27h 42mMultiple Airlines
dom. 5/48:56 pmSEA - TYS
2 stops16h 29mMultiple Airlines
Deal found 3/20$275
This Frontier deal was found by Cheapflights users on 3/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/55:25 pmTYS - SEA
1 stop10h 09mFrontier
dom. 6/86:25 amSEA - TYS
1 stop7h 04mFrontier
Deal found 3/19$348
This American Airlines deal was found by Cheapflights users on 3/20. 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.
mié. 4/233:09 pmTYS - SEA
1 stop11h 00mAmerican Airlines
mar. 4/2911:59 pmSEA - TYS
1 stop11h 39mAmerican Airlines
Deal found 3/20$397
This Delta deal was found by Cheapflights users on 3/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/512:00 pmTYS - SEA
1 stop7h 25mDelta
mar. 7/1511:35 pmSEA - TYS
1 stop8h 32mDelta
Deal found 3/20$457
This United deal was found by Cheapflights users on 3/20. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/235:45 amTYS - SEA
2 stops16h 16mUnited Airlines
mar. 4/292:18 pmSEA - TYS
1 stop16h 57mUnited Airlines
Deal found 3/20$492
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
jue. 9/116:08 amTYS - SEA
1 stop8h 14mAlaska Airlines
dom. 9/1412:33 amSEA - TYS
1 stop9h 41mAlaska Airlines
Deal found 3/21$733

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 marzo 21, 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

vie. 5/2

10:53 am-11:35 am

2 stops27h 42m

Seattle/Tacoma Intl

dom. 5/4

8:56 pm-4:25 pm

2 stops16h 29m

$275

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jue. 6/5

5:25 pm-12:34 am

1 stop10h 09m

Seattle/Tacoma Intl

dom. 6/8

6:25 am-4:29 pm

1 stop7h 04m

$348

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

mié. 4/23

3:09 pm-11:09 pm

1 stop11h 00m

Seattle/Tacoma Intl

mar. 4/29

11:59 pm-2:38 pm

1 stop11h 39m

$397

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

sáb. 7/5

12:00 pm-4:25 pm

1 stop7h 25m

Seattle/Tacoma Intl

mar. 7/15

11:35 pm-11:07 am

1 stop8h 32m

$457

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

mié. 4/23

5:45 am-7:01 pm

2 stops16h 16m

Seattle/Tacoma Intl

mar. 4/29

2:18 pm-10:15 am

1 stop16h 57m

$492

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

jue. 6/5

7:00 am-9:30 pm

2 stops17h 30m

Seattle/Tacoma Intl

jue. 6/5

12:34 am-11:47 am

1 stop8h 13m

$742

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

vie. 5/9

10:53 am-2:25 pm

2 stops30h 32m

$136

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

dom. 4/13

4:43 pm-11:56 am

1 stop22h 13m

$156

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

mar. 8/19

1:20 pm-9:11 pm

1 stop10h 51m

$204

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

sáb. 6/21

4:00 pm-8:42 pm

1 stop7h 42m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 11 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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapTicketsDealPrice 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 Knoxville-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Seattle flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 14, 2025.

The best time to book flights from Knoxville to Seattle is 25 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, January is the cheapest month in which you can book a flight from Knoxville to Seattle (average of $238). Flying from Knoxville to Seattle in July is currently the most expensive (average of $411). 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 marzo 21, 2025.

It’s typically best to fly out from Knoxville to Seattle in the evening. Doing so could potentially save you 54% 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 Friday 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 marzo 21, 2025.
Alaska Airlines
8.0
Very good
9,759 reviews

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,759 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,895 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Frontier
6.0
Okay
3,272 reviews
Alaska Airlines
8.0
Very good
9,759 reviews

Boarding

8.2

Food

7.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

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

    According to our current data, Frontier ($348), American Airlines ($397), and Delta ($457) offers the cheapest pricing from Knoxville to Seattle. These flights start at 48% 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 $156 on Frontier. Other airlines that offer cheap prices include American Airlines from $204 and Delta from $229 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, January is the cheapest month in which you can book a flight from Knoxville to Seattle (average of $238). Flying from Knoxville to Seattle in July is currently the most expensive (average of $411). 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
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Lacey
Ocean Shores
Leavenworth
Federal Way
Olympia
Cle Elum
Centralia
Mukilteo
Issaquah
Aberdeen
Shoreline
Lynnwood
Shelton
Silverdale
Redmond

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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 marzo 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$123Average$303FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$382Average$654FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$508Average$702FlexibilityNo cancel feeOn-time69%
DeltaCheapest$548Average$725FlexibilityNo cancel feeOn-timeN/A
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