SEA - TYS

$139 Find Cheap Flights from Seattle to Knoxville - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Knoxville departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$309
Typical prices: $429-$630
Multiple Airlines
Wed 9/9Sun 9/27
SEA - TYS • 1 stop
Cheapest one-way
$139
Typical prices: $268-$428
Multiple Airlines
Sat 10/3
SEA - TYS • 1 stop
Top airlines
Cheapest • from $354 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Knoxville. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $570 (round-trip)
Shortest trip • 7h 01m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 7 weeks in advance save around 20% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 12% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Knoxville!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Knoxville (SEA-TYS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Knoxville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Knoxville

Wed, Sep 9 - Sun, Sep 27
Multiple Airlines Logo
7:00 am - 1:44 pm
SEA
-
TYS
27h 44m
1 stop
Multiple Airlines Logo
7:00 am - 9:42 am
TYS
-
SEA
53h 42m
2 stops
$309Multiple Airlines
Wed, Sep 9 - Mon, Sep 21
Multiple Airlines Logo
4:27 pm - 1:44 pm
SEA
-
TYS
18h 17m
1 stop
Multiple Airlines Logo
6:30 am - 9:42 am
TYS
-
SEA
30h 12m
1 stop
$311Multiple Airlines
Wed, Sep 9 - Mon, Sep 21
Multiple Airlines Logo
9:45 pm - 10:53 pm
SEA
-
TYS
22h 08m
2 stops
Multiple Airlines Logo
6:30 am - 9:42 am
TYS
-
SEA
30h 12m
1 stop
$313Multiple Airlines
Wed, Aug 26 - Thu, Aug 27
United Airlines Logo
11:04 pm - 10:37 am
SEA
-
TYS
8h 33m
1 stop
United Airlines Logo
6:02 pm - 10:43 pm
TYS
-
SEA
7h 41m
1 stop
$358United Airlines
Sun, Aug 30 - Tue, Sep 8
American Airlines Logo
12:40 am - 12:56 pm
SEA
-
TYS
9h 16m
1 stop
American Airlines Logo
1:46 pm - 6:47 pm
TYS
-
SEA
8h 01m
1 stop
$363American Airlines
Wed, Sep 9 - Tue, Sep 15
American Airlines Logo
5:30 am - 4:42 pm
SEA
-
TYS
8h 12m
1 stop
American Airlines Logo
6:00 am - 11:11 am
TYS
-
SEA
8h 11m
1 stop
$363American Airlines
Wed, Sep 9 - Wed, Sep 23
United Airlines Logo
5:00 am - 3:54 pm
SEA
-
TYS
7h 54m
1 stop
United Airlines Logo
12:15 pm - 7:08 pm
TYS
-
SEA
9h 53m
1 stop
$363United Airlines
Wed, Sep 16 - Mon, Sep 21
Delta Logo
11:35 am - 11:55 pm
SEA
-
TYS
9h 20m
1 stop
Delta Logo
4:40 pm - 11:58 pm
TYS
-
SEA
10h 18m
1 stop
$363Delta
Thu, Nov 12 - Tue, Nov 17
Delta Logo
6:00 am - 4:29 pm
SEA
-
TYS
7h 29m
1 stop
Delta Logo
6:09 pm - 11:59 pm
TYS
-
SEA
8h 50m
1 stop
$363Delta
Sat, Sep 19 - Sat, Sep 26
United Airlines Logo
11:04 pm - 10:37 am
SEA
-
TYS
8h 33m
1 stop
United Airlines Logo
4:16 pm - 10:36 pm
TYS
-
SEA
9h 20m
1 stop
$363United Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Knoxville flights

Get data-powered insights and trends into flights from Seattle to Knoxville to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Knoxville?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Knoxville departing in September.

Flight prices are below average for this route right now.

Flights to Knoxville from Seattle usually cost between $456 and $566 in September.
The lowest price found in the past 5 days was $309 on Multiple Airlines (Sep 9-Sep 27).

What is the cheapest month to fly from Seattle to Knoxville?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Knoxville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Knoxville is August, where tickets cost $493 (return) on average. On the other hand, the most expensive months are March and June, where the average cost of round-trip tickets is $681 and $608 respectively.

How far in advance should I book a flight from Seattle to Knoxville?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Knoxville, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Knoxville, you should book around 7 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low season

January

Cheapest flight

$139
Most popular time to fly and prices are also 6% lower on average.
Flight from Seattle to Knoxville

When to book flights from Seattle to Knoxville

Are your dates flexible? Find out the best times to travel from Seattle to Knoxville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Knoxville

  • Which kid-friendly options does United Airlines provide on flights from Seattle to Knoxville?

    United Airlines offers a range of kid-friendly options on flights from Seattle to Knoxville, ensuring an enjoyable journey for young travelers. Children can enjoy a variety of entertainment choices, including kid-friendly movies, TV shows, and games on personal seat back screens. Additionally, the airline offers activity kits that contain coloring books, games, and puzzles to keep children engaged during the flight.

  • Which American Airlines layovers are common on flights from Seattle to Knoxville?

    Common layovers on flights from Seattle to Knoxville with American Airlines may include cities such as Dallas-Fort Worth, Charlotte, and Chicago. These layovers often provide convenient connections for passengers traveling between the two cities. For instance, passengers may have a layover in Dallas-Fort Worth International Airport, Charlotte Douglas International Airport, or Chicago O'Hare International Airport before continuing their journey to Knoxville.

  • American Airlines uses which lounges for flights from Seattle to Knoxville?

    American Airlines offers access to several lounges for passengers flying from Seattle to Knoxville. One example is the American Airlines Admirals Club at Seattle-Tacoma International Airport. Another option is the Admirals Club at Knoxville's McGhee Tyson Airport, providing a relaxing environment before the flight. These lounges enhance the overall travel experience for American Airlines' customers on this route.

  • Which ground transportation means can I use from the airport after my flight from Seattle to Knoxville?

    After your flight from Seattle to Knoxville, you can utilize numerous public transportation options from the airport. For instance, you can hop on the McGhee Tyson Airport shuttle service, which provides convenient connections to various destinations within Knoxville. Additionally, there are local bus services like KAT (Knoxville Area Transit) that offer affordable and accessible travel throughout the city.

  • What is the cheapest flight from Seattle to Knoxville?

    In the last 5 days, the lowest price for a flight from Seattle to Knoxville was $139 for a one-way ticket and $309 for a round-trip.

  • Do I need a passport to fly between Seattle and Knoxville?

    No

  • Which airports will I be using when flying from Seattle to Knoxville?

    Seattle and Knoxville are both served by 1 main airport. You will leave Seattle from Seattle/Tacoma Intl and will be arriving at Knoxville McGhee Tyson.

  • Which aircraft models fly most regularly from Seattle to Knoxville?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Knoxville?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Knoxville, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Knoxville, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to Knoxville are Alaska Airlines and Delta. With an average price for the route of $760 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $560 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Seattle to Knoxville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Knoxville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Knoxville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Knoxville from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Knoxville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Knoxville with an airline and back to Seattle with another airline. Booking your flights between Seattle and TYS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Knoxville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Knoxville from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Knoxville

  • United Airlines has specific pet restrictions for flights from Seattle (SEA) to Knoxville (TYS). Only cats and dogs are allowed as in-cabin pets, while other animals must be transported in the cargo hold. In-cabin pets must be small enough to fit comfortably in a carrier under the seat in front of you. The weight limit for pets in the cabin is typically 20 lbs., including the weight of the carrier.
  • Passengers flying United Airlines from Seattle to Knoxville can pre-select their seats. When booking their tickets or managing their reservations online, passengers have the option to choose their preferred seats. By pre-selecting seats, passengers can ensure their desired seating arrangements and enhance their travel experience with United Airlines.
  • United Airlines supports sustainable travel on flights from Seattle to Knoxville by implementing various eco-friendly initiatives. They utilize fuel-efficient aircraft, optimize flight routes to reduce fuel consumption, and encourage passengers to participate in their carbon offset program. By prioritizing sustainability, United Airlines strives to minimize their environmental impact and promote greener travel choices.
  • You can rent a car after your flight from Seattle to Knoxville. There are several rental companies available at Knoxville's McGhee Tyson Airport, including major brands like Hertz, Avis, Enterprise, Budget, and National Car Rental. These companies offer a range of vehicles to pick from, accommodating various budgets and preferences. Simply visit their respective counters at the airport to arrange your rental and explore Knoxville and its surroundings conveniently.
  • Frontier Airlines offers a range of in-flight entertainment amenities on their flights from Seattle to Knoxville, ensuring passengers have an enjoyable journey. Travelers can expect to find a variety of options, such as seat back screens with a selection of movies and TV shows, in-flight magazines to browse through, and even free internet connectivity for those who prefer to stream their own entertainment on personal devices.

Reviews of the top 4 airlines serving from Seattle to Knoxville

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Knoxville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Knoxville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12726 reviews
8.5Crew
7.0Entertainment
7.0Food
8.1Boarding
7.8Comfort
Airline reviews

Multi gate changes and flight delay were irritating. Food on board was terrible and expensive for what was offered.

8.0 ExcellentAnonymous, Jul 2026
SEA - BNA
Read more Alaska Airlines reviews

Multi gate changes and flight delay were irritating. Food on board was terrible and expensive for what was offered.

Overall the experience was good. Check in at the bag drop was challenging as the system was having issues and there was only one attendant helping the passengers. My personal experience was okay as it was straight forward but there were many who were having issues. The flight was good. I did not use the in flight entertainment very much as I had brought my own but it seemed to work well.

Technically this was the flight where they lost my bags, but I already explained that on the review for my connecting flight, so I'm not gonna do it again.

Hate the way they nickel and dime you on pricing. Extra for baggage, extra for a pre assigned seat. Make it one price and be done with it.

Delayed due aircraft maintenance. The plane was so small, hardly to get to the toilet when they’re serving food/drinks. But the ground crews were so helpful and trying their best to update all situation. The flight attendants not as friendly but fine.

same as the first when you pay for choice of seats than you don't receive them its very frustrating it was an extra fee of $80 dollars Craig Molan

The flight got delayed for some unknown reason to us. Then, after boarding, we stayed grounded for almost an hour without any explanation or announcement. Then, finally lifted off. When we landed and made our way to baggage claim. The luggage took 30 minutes to come! It was past midnight due to the flight being delayed and my litter children were cranky and tired! It was not a great experience. Perhaps, more explanation of what is going on with the flight would be helpful!

Its bumpy but I can say its safe flight ,Thanks Alaska airline for bringing me in my destination😊.

The used cups and wrappers weren’t picked up after the first two hours of 4 hr flight. I had the middle seat and had to ask the gentleman next to Me to hold the cup with water in it while I used got out of the seatt while I used the restroom.. At one point I asked attendant to take it and she said she’d be back but never did come back. Usually they pick up several times during flight.

The boarding gate is literally just an aisle to the concourse. There is no seating and it's shared with several other airlines. It's crowded, hot, and standing-room only. It's difficult to hear gate announcements over the PA system with too many other carriers crammed into a small space. I've enjoyed flying AA in the past on the west coast, but the BNA single gate experience is horrendous! Never again from BNA to SEA with AA.

My flight was delayed by 4 hours in 30 minute increments. The gate agents were amazing but the communication was not. We were told that there was a maintenance issue but they didn't know what it was. That didn't inspire confidence. Then they said they found it and it was fixed and the pilot just needed to sign off. Then the pilot needed to talk to the other pilot from the arriving flight and we'd be fine. Then we were waiting for the pilot to call back. Then the maintenance issue wasn't fixed. Then they decided we were getting a new plane (why didn't they decide this earlier??). Fine. But then they announced we were changing gates AND terminals. And we were boarding in 20 minutes. So we all had to run to the new terminal gate. We could have taken off at that time, but we then had to wait for all the people who rebooked on a different flight to book this flight again. That took 30+ minutes because there was only one gate agent. When everyone ditched this flight, I saw it as an opportunity to upgrade to comfort. Delta, the greedy jerks they are, charged me $121. After their delay, their fault, their issues, couldn't even discount an upgrade. They only handed out $12 meal vouchers for the delay. I can't even get a snack from starbucks for that.

Love me some Delta. One of the few airlines to recognize and support veterans. Easy boarding, flight was on time and arrived early and the flight attendants were excellent on this flight.

The flights are constantly late anymore, and they won't even give you a glass of water on the plane. For years, they were able to do a service on this flight from Atlanta to Knoxville and Knoxville Atlanta now they say it's too short of a flight. You can't even get a quick drink of water.

We sat on the runway for over an hour before departure. That was unwelcome.

Should never have had to go to Detroit from Orlando back to Tennessee!

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

The cabin temperature was nice and cool. The wifi was not working.

Smallest leg room I've ever had on a plane.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

Flight be on time would be a good start. Then train your flight attendants to be attentive and friendly. This time they completely forgot my row for the measly snack! United, do better!

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Delayed by 2.5hrs any longer and they would’ve had to honour their own policy for breaking their own rules and regs. Not cool, especially when I have an infant child that needs to stay on a routine and they get schedules.

They had three choices for snacks - but you could only have one - and they ran out of the dark chocolate before they made it all the way down the aisle... Packed flight - limited service.

They opened my checked bag and even though my lock was tsa approved, they loose my lock and left my bag just like that. Incompetent people, very upset about it. I’ll try to avoid traveling with united

We fly to Ecuador frequently. Checking in is usually a hassle because most United agents take some time before they can verify that my passport doesn't require a visa to Ecuador. This time the process was even longer due to the cyber attack. But she was really nice to us. So glad we brought plenty of snacks to supplement the 3 flights from SEA to GYE.

For some strange reason I was put in zone 5 for boarding even though I had paid premium price for a premium seat right behind business class. This must have been a flaw because everyone else around me in the same zone (row) had been placed in zone 3.

The flight was delayed almost three hours. I understand delays happen from time to time, but this flight was delayed no less than 10 times. I wish the amount of time of the delay was more accurate, versus delaying in 10 or 20 minute increments many, many times.

Flight attendants and crew were great! This plane was fine. It was clean and everything worked properly. Now, the gate change was not communicated. No text or information. It wasn't far with the gate change but it still changed without any communication. Not sure if this is on American or Kayakl. Also, internet was the worst. I would never have ATT. 3+hr flight and weak internet. I think I watched the commercials to get on at least 6 times. Terrible internet!

Delays experienced in boarding/take off due to incoming plane delayed. However, the boarding time/depart time in the app was significantly delayed in providing these updates. Usually not updated until an hour after we should have already boarded. Poorly managed.

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Dreadful experience. Our flight was delayed more than 8 hours due to a maintenance issue and the assistance from rebooking was poor. I was travelling with a bad knee and needed assistance waited in one place more than 3 hours before someone came with a wheelchair. The woman next to me was a 91 year old great grandmother who had waited more than 4 hours. There were moments of support from the staff but it appeared as they were going against the direction of management. It was apathy, lack of ownership and dismissive responses with small moments of kindness and understanding typically from grey haired, female, veteran staff..

At least it was a short flight. Greyhound with wings.

Everything was great except it became so hot on the plane I couldn’t sleep on my red eye flight. It didn’t really cool down till we started descending.

Our flight got changed and/or delayed 8 times before we boarded.

Everything you need to know for your flight from Seattle to Knoxville

Information on your arrival and departure airports