HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$117+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SEA
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Knoxville to Seattle with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Knoxville McGhee Tyson to Seattle/Tacoma Intl are usually found in October or March, 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$281
(Mytrip)

One-way from

$117
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$726
Provider with most accurate pricing for Knoxville McGhee Tyson-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Seattle/Tacoma Intl flights.
Search Deals
From Knoxville McGhee Tyson to Seattle/Tacoma Intl
Search Deals
One-way flight from Knoxville McGhee Tyson to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 20, 2025.

This Mytrip deal was found by Cheapflights users on 2/20. 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.
Mon 5/512:50 pmTYS - SEA
1 stop25h 45mMultiple Airlines
Wed 5/144:58 pmSEA - TYS
2 stops26h 59mMultiple Airlines
Deal found 2/20$281
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Wed 4/233:09 pmTYS - SEA
1 stop11h 00mAmerican Airlines
Tue 4/2911:59 pmSEA - TYS
1 stop11h 39mAmerican Airlines
Deal found 2/18$367
This Delta deal was found by Cheapflights users on 2/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/167:48 amTYS - SEA
1 stop9h 39mDelta
Mon 4/216:10 pmSEA - TYS
2 stops12h 11mDelta
Deal found 2/18$477
This United Airlines deal was found by Cheapflights users on 2/18. 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.
Wed 4/237:00 amTYS - SEA
1 stop18h 43mUnited Airlines
Tue 4/295:14 amSEA - TYS
2 stops15h 01mUnited Airlines
Deal found 2/18$516

Find flights from Knoxville to Seattle within your budget

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 February 20, 2025.

Fly from

Knoxville

Fly to

Seattle

Route

Depart

Return

Price

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Mon 5/5

12:50 pm-11:35 am

1 stop25h 45m

Seattle/Tacoma Intl

Wed 5/14

4:58 pm-10:57 pm

2 stops26h 59m

$281

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 4/23

3:09 pm-11:09 pm

1 stop11h 00m

Seattle/Tacoma Intl

Tue 4/29

11:59 pm-2:38 pm

1 stop11h 39m

$367

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 4/16

7:48 am-2:27 pm

1 stop9h 39m

Seattle/Tacoma Intl

Mon 4/21

6:10 pm-9:21 am

2 stops12h 11m

$477

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 4/23

7:00 am-10:43 pm

1 stop18h 43m

Seattle/Tacoma Intl

Tue 4/29

5:14 am-11:15 pm

2 stops15h 01m

$516

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Mon 5/12

10:53 am-3:53 pm

2 stops32h 00m

$117

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 6/11

2:32 pm-10:59 pm

1 stop11h 27m

$311

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sun 8/10

5:08 pm-12:43 am

1 stop10h 35m

$361

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 5/31

4:52 pm-8:01 am

1 stop18h 09m

$372

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 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.

Travel insights for flights from Knoxville to Seattle

Get recent, data-driven insights about flights from Knoxville to Seattle including ideal travel times, pricing trends, and more.

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 February 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 February 20, 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 February 20, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and American Airlines from Knoxville to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,219 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,765 reviews
Delta
8.0
Very good
8,219 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,219 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Frontier
6.0
Okay
3,355 reviews
Delta
8.0
Very good
8,219 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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, American Airlines ($367), Delta ($477), and United Airlines ($516) offers the cheapest pricing from Knoxville to Seattle. These flights start at 45% 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 $311 on American Airlines. Other airlines that offer cheap prices include Frontier from $361 and United Airlines from $372 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
Renton
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Federal Way
Centralia
Marysville
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Knoxville to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Seattle flights
Nashville to Portland flights
Memphis to Seattle flights
Chattanooga to Seattle flights
Knoxville to Portland flights
Blountville to Seattle flights
Memphis to Portland flights
Nashville to Spokane flights
Memphis to Spokane flights
Knoxville to Spokane flights
Chattanooga to Portland flights
Blountville to Portland flights
Nashville to Pullman flights
Knoxville to Pasco flights
Nashville to Pasco flights
Chattanooga to Pasco flights
Knoxville to Walla Walla flights
Memphis to Pasco flights
Memphis to Bellingham flights
Memphis to Pullman flights
Nashville to Wenatchee flights
Blountville to Spokane flights
Nashville to Bellingham flights
Chattanooga to Spokane flights
Chattanooga to Bellingham flights
Chattanooga to Walla Walla flights

Top 5 airlines flying from Knoxville to Seattle

Discover the top 5 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$120Average$307FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$381Average$655FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$409Average$779FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$515Average$722FlexibilityNo cancel feeOn-time69%
DeltaCheapest$548Average$734FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.