TYS - SEA

$137 Find Cheap Flights from Knoxville to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Seattle departing on 5/8. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$301
Overall average: $556
Multiple Airlines
Fri 4/3Wed 4/15
TYS - SEA • 2 stops
Cheapest one-way
$137
Typical prices: $269-$430
Frontier
Fri 5/8
TYS - SEA • 1 stop
Top airlines
Cheapest • from $342 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Knoxville and Seattle. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $372 (round-trip)
Shortest trip • 7h 03m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 11% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 27% price drop
Most popular
Good to know
Good to know
+1
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Start a new search
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Knoxville to Seattle (TYS-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to Seattle 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 Knoxville to Seattle

Fri, Apr 3 - Wed, Apr 15
Multiple Airlines Logo
7:11 pm - 11:37 am
TYS
-
SEA
43h 26m
2 stops
Multiple Airlines Logo
8:07 pm - 3:33 pm
SEA
-
TYS
16h 26m
1 stop
$301Multiple Airlines
Fri, Apr 3 - Sat, Apr 18
Multiple Airlines Logo
7:11 pm - 11:37 am
TYS
-
SEA
43h 26m
2 stops
Multiple Airlines Logo
7:12 pm - 3:33 pm
SEA
-
TYS
17h 21m
1 stop
$337Multiple Airlines
Mon, May 11 - Thu, May 14
Frontier Logo
8:32 pm - 9:49 am
TYS
-
SEA
16h 17m
1 stop
Frontier Logo
7:50 pm - 7:33 pm
SEA
-
TYS
20h 43m
1 stop
$342Frontier
Thu, May 7 - Mon, May 11
Multiple Airlines Logo
8:00 am - 10:22 am
TYS
-
SEA
29h 22m
2 stops
Multiple Airlines Logo
11:37 am - 10:51 pm
SEA
-
TYS
8h 14m
1 stop
$348Multiple Airlines
Fri, May 8 - Mon, May 11
Multiple Airlines Logo
8:32 pm - 9:49 am
TYS
-
SEA
16h 17m
1 stop
Multiple Airlines Logo
11:37 am - 10:51 pm
SEA
-
TYS
8h 14m
1 stop
$351Multiple Airlines
Fri, May 22 - Sun, May 31
Frontier Logo
8:32 pm - 10:06 am
TYS
-
SEA
16h 34m
1 stop
Frontier Logo
7:50 pm - 7:33 pm
SEA
-
TYS
20h 43m
1 stop
$371Frontier
Tue, May 5 - Tue, May 12
American Airlines Logo
4:09 pm - 9:22 pm
TYS
-
SEA
8h 13m
1 stop
American Airlines Logo
6:00 am - 6:04 pm
SEA
-
TYS
9h 04m
1 stop
$375American Airlines
Fri, May 8 - Mon, May 11
Multiple Airlines Logo
12:45 pm - 9:49 am
TYS
-
SEA
24h 04m
2 stops
Multiple Airlines Logo
11:37 am - 10:51 pm
SEA
-
TYS
8h 14m
1 stop
$376Multiple Airlines
Fri, Apr 3 - Thu, Apr 16
Multiple Airlines Logo
7:11 pm - 11:37 am
TYS
-
SEA
43h 26m
2 stops
Multiple Airlines Logo
8:25 pm - 10:51 pm
SEA
-
TYS
23h 26m
1 stop
$378Multiple Airlines
Wed, Apr 29 - Wed, Apr 29
American Airlines Logo
6:00 am - 10:48 am
TYS
-
SEA
7h 48m
1 stop
American Airlines Logo
12:59 am - 12:30 pm
SEA
-
TYS
8h 31m
1 stop
$384American Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to Seattle flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Seattle, 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 Knoxville to Seattle is August, where tickets cost $396 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $778 and $596 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Knoxville to Seattle, 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 Knoxville to Seattle, you should book around 5 weeks before departure, which saves you about 11% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonDecember
Cheapest flight$137
Best time to beat the crowds but there is an average 43% increase in price.
Most popular time to fly with an average 2% increase in price.
Flight from Knoxville to Seattle

When to book flights from Knoxville to Seattle

Are your dates flexible? Find out the best times to travel from Knoxville to Seattle 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 Knoxville to Seattle

  • How convenient are Knoxville to Seattle flights for Persons with Reduced Mobility (PRMs)?

    Although most airlines consider PRMs, you will conveniently fly from Knoxville to Seattle via United Airlines. Priority boarding for PRMs and their families, free wheelchair assistance, and a team of specially trained staff members to provide specialized services to PRMs are just a few of the airline's special access services.

  • What pet-friendly airline should I consider for my flight from Knoxville to Seattle?

    Consider booking your flight ticket with Frontier from Knoxville to Seattle with your furry friend. Frontier's pet-friendly allows smaller pets that can fit under your seat to travel in the cabin. Larger domestic pets may have to be transported as cargo in pressure- and temperature-controlled carriers.

  • Which eco-friendly airline should I consider for my Knoxville to Seattle flight?

    Consider using United Airlines for your flights from Knoxville to Seattle if you want to travel sustainably. The airline has invested in sustainable biofuels, fuel-efficient aircraft, recycling initiatives, and energy-saving technologies to reduce waste. To lessen its environmental impact, United Airlines collaborates with environmental organizations to advocate for carbon offsetting initiatives.

  • How can I connect to the city center after deplaning from m Knoxville to Seattle flight at Seattle/Tacoma Intl (SEA)?

    For most travelers, Seattle/Tacoma Intl (SEA) is the destination airport, but not the final destination. To connect from Seattle/Tacoma Intl (SEA) to the city center, there are various transport options. After deplaning from your Knoxville to Seattle flight, you will either board Link Light Rail, a taxi, ride-share services like Lyft or a public means of transport, such as Metro Transit Bus Route 40 and 124. Buses and trains offer more budget-friendly and reliable options than taxis.

  • What is the cheapest flight from Knoxville to Seattle?

    In the last 3 days, the lowest price for a flight from Knoxville to Seattle was $137 for a one-way ticket and $301 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

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

  • Which airline alliances offer flights from Knoxville to Seattle?

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

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

    The two airlines most popular with KAYAK users for flights from Knoxville to Seattle are Delta and United Airlines. With an average price for the route of $570 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $522 and an overall rating of 7.4.

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

    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 Knoxville to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Knoxville 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 Knoxville to Seattle?

    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 Seattle with an airline and back to Knoxville with another airline. Booking your flights between Knoxville and SEA 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 Knoxville to Seattle?

    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 Seattle from Knoxville 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 Knoxville to Seattle

  • Most airlines connecting Knoxville (TYS) to Seattle (SEA) offer flights with at least a single layover. Some of the common layovers to expect on your flight from Knoxville to Seattle are Chicago O'Hare Intl (ORD), Washington, D.C. Dulles Intl (IAD), and Dallas/Fort Worth (DFW).
  • Besides serving as the major destination airport for travelers connecting to Seattle, Seattle/Tacoma Intl (SEA) is also the destination airport for travelers who may be connecting to its nearby cities. Some of these cities are; Victoria, Surrey, and Burnaby. You can easily travel to these cities by renting a car or taxi.
  • To rent a car for movement flexibility after deplaning from your flight from Knoxville to Seattle, you will visit any onsite car rentals conveniently accessible at the Sea-Tac Airport Rental Vehicle Facility within the airport premises. A courtesy bus connects each terminal to the car rental facility.
  • Alaska Airlines is among the family-friendly airlines to consider for your flight from Knoxville to Seattle with children. Besides priority boarding and kid-friendly entertainment, the airline allows families with children under two to travel free on their parent's laps.
  • Among the transport options for travelers connecting from Downtown Knoxville to McGhee Tyson (TYS) are taxis and Knoxville Area Transit (KAT) buses. Among these options, taxis offer a quicker and more flexible option, but they are slightly more expensive compared to buses.

Reviews of the top 4 airlines serving from Knoxville to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Seattle. 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 Knoxville to Seattle? 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
DeltaOverall score based on 8313 reviews
8.5Crew
8.1Boarding
7.9Comfort
7.2Food
7.8Entertainment
Airline reviews

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

2.0 MediocreAnonymous, Mar 2026
HNL - ATL
Read more Delta reviews

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Delta needs to step its game up get a more reliable internet service. Internet service was non-existent for this flight.

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

THEY FAILED ME AND I NEVER GOT ON THE FLIGHT BECAUSE IT WAS SO DELAYED! I ENDED UP HAVING TO PAY OUT OF POCKET FOR A HOTEL AND STAY IN NASHVILLE TO CATCH A FLIGHT FOR THE FOLLOWING DAY. DELTA IS POOR CUSTOMER SERVICE>

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff on board and gate was nice - a welcome change from the usual. We also arrived early, which was a great benefit, given that it takes 30 minutes plus to get bags at SRQ.

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

Experience was great - no complaints. Took off on time, landed early. Got to the gate relatively quickly - took a little bit of extra time to deplane but nothing excessive.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

Absolutely terrible. Would never fly American again. 2 deplaned incidents and delayed by close to 24 hours. $12 meal voucher for first class passengers was an insult to the injury. Pathetic.

Terrible planning. And even worse gate agents. Absolutely rude behavior.

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

Flight was scheduled at 11:26am but they keep Delaying until midnight. They waited at airport restless.

Rough flight No beverage service due to turbulence Bottom Seat cushion was non existent

Great experience. Good dinner and service. FA's were very nice and attentive.

It was great. Smooth flight, comfortable, left on time and landed on time.

We hoarded. Then we deplaned. Then we waited for 10 hours in the MSP airport due to a wheel misfunction. We understand safety but communication between crew and airport staff was horrible. When we did finally board, we were rushed on and because we were waiting for a “fresh” pilot and crew, we sat in a roasting plane with no A/C for an hour. My question is why was this flight not cancelled right away when they knew this would be a huge issue OR, why did AA not get a substitute plane, considering this was already a full flight? To me, this appears to be a complete breakdown in leadership and utter systems failure. The compensation for completely disrupting travel plans for hundreds, which we paid dearly for, was measly. While we appreciated the lodging for the night, $12 in meal vouchers isn’t going to sustain anyone for over 12 hours. “We apologize; our hands are tied” is no longer an acceptable explanation. We are so completely turned off by this experience and will definitely seek alternative avenues when we need to fly.

Mostly good. The WiFi wasn’t working so that was not great.

I rated the experience "mediocre" because of the 2 hour delay in take off. This is the 4th flight from DFW on AA where there was a delay and in one of the instances (after 13 delays), the flight was cancelled. I understand weather but for the March 18th flight, there was no weather issue in Dallas or Detroit. I called Concierge Key and they were wonderful, booking me on a later flight in case my flight was cancelled. I have flown with American for many years and never has there been this consistent pattern of delays. Very disappointing.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

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

Information on your arrival and departure airports