TYS - SEA

$130 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 8/10. 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

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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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

Thu, Sep 18 - Mon, Sep 22
Frontier Logo
8:26 pm - 12:30 amTYS-SEA
7h 04m1 stop
Frontier Logo
6:12 am - 7:41 pmSEA-TYS
10h 29m1 stop
$180Frontier
Find Deal
Thu, Sep 18 - Mon, Sep 22
Frontier Logo
8:26 pm - 12:30 amTYS-SEA
7h 04m1 stop
Frontier Logo
6:12 am - 7:41 pmSEA-TYS
10h 29m1 stop
$192Frontier
Find Deal
Thu, Aug 21 - Wed, Aug 27
Delta Logo
6:03 pm - 11:54 pmTYS-SEA
8h 51m1 stop
Delta Logo
1:30 pm - 11:48 pmSEA-TYS
7h 18m1 stop
$309Delta
Find Deal
Sat, Nov 8 - Sun, Nov 16
United Airlines Logo
7:00 am - 1:54 pmTYS-SEA
9h 54m2 stops
United Airlines Logo
11:50 pm - 10:05 amSEA-TYS
7h 15m1 stop
$314United Airlines
Find Deal
Mon, Aug 18 - Wed, Aug 27
Delta Logo
6:03 pm - 11:54 pmTYS-SEA
8h 51m1 stop
Delta Logo
7:10 am - 11:48 pmSEA-TYS
13h 38m2 stops
$328Delta
Find Deal
Sat, Nov 8 - Sat, Nov 15
American Airlines Logo
3:00 pm - 8:51 pmTYS-SEA
8h 51m1 stop
American Airlines Logo
1:24 am - 10:47 amSEA-TYS
6h 23m1 stop
$339American Airlines
Find Deal
Tue, Sep 30 - Fri, Oct 10
American Airlines Logo
7:14 am - 5:29 pmTYS-SEA
13h 15m1 stop
American Airlines Logo
12:34 am - 2:33 pmSEA-TYS
10h 59m1 stop
$367American Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
United Airlines Logo
7:00 am - 11:31 amTYS-SEA
7h 31m1 stop
United Airlines Logo
5:02 am - 5:00 pmSEA-TYS
8h 58m2 stops
$370United Airlines
Find Deal
Tue, Jul 29 - Tue, Aug 5
 Logo
4:55 pm - 4:25 pmTYS-SEA
26h 30m3 stops
 Logo
5:30 pm - 11:50 amSEA-TYS
15h 20m2 stops
Fri, Jul 18 - Tue, Jul 22
 Logo
11:01 am - 10:47 pmTYS-SEA
14h 46m1 stop
 Logo
5:30 pm - 11:50 amSEA-TYS
15h 20m2 stops
Useful Info

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’s the cheapest day of the week to fly from Knoxville to Seattle?

The average price of all round-trip flights from Knoxville to Seattle clicked on KAYAK for each day over the last 12 months.

When flying from Knoxville to Seattle, you should consider leaving on a Friday and avoid Mondays if you are looking for the best rates. For your return to Knoxville, you’ll find the best rates on Tuesdays and the most expensive ones on Sundays.

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 $563 (return) on average. On the other hand, the most expensive months are February and January, where the average cost of round-trip tickets is $726 and $718 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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low seasonJanuary
High seasonMay
Cheapest flight$130
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 7% 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 $130 for a one-way ticket and $180 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 oneworld 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 $690 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $696 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.
8.0
DeltaOverall score based on 7982 reviews
7.9Comfort
7.9Entertainment
8.2Boarding
7.3Food
8.5Crew
Airline reviews

After all the weather issues at least they got me to my destination the next day

4.0 OkayAnonymous, Jul 2025HSV - ATL
Read more Delta reviews

After all the weather issues at least they got me to my destination the next day

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Boarding was organised and relaxed. Crew were fantastic! Seats were lacking padding causing butt pain and stiffness.

Boarded plane and then delayed 1.5 hours while on the plane

Survey sent before we actually left. Delay after delay. Now a crew problem.

I love flying with United. Unfortunately, I flew on an older plane with minimal upgraded technology (no Bluetooth functionality or handy charging ports). Otherwise, the flight was great and even arrived early.

They changed my seats after I checked in and I was stressed from the time I saw that information until just before boarding, when the gate attendant fixed it, but it shouldn't have happened. And if it couldn't be prevented, then the people on the phone I spoke with should have done something to help, which they did not, nor did they offer me compensation, just meaningless apologies.

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

Very rough getting into denver. my kid threw up it was so rough.

We were given vouchers we couldn’t use with a 5.5 hour delay

Cramped seat even in economy plus seat 10A. Over booked flight, no space for the bags

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Boarding gate in Honolulu was staffed with a great clerk with a soothing voice despite the flight delay of over an hour. Flight attendants in the plane were all grumpy, not pleasant looking bunch. Their sour attitude showed throughout the flight. Inly able to get a select few movies started. Most of the movie links in the “free entertainment” did not work.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

The flight delay in Dallas created a domino effect that impacted all connecting flights, leading to an increase in the number of connections. As a result, I missed my flight from Casablanca to Marrakech due to the tight turnaround when landing in Casablanca. CMN Airport was understaffed; only one employee was available to assist passengers while others just stood by and watched. It was an extremely frustrating situation. Many passengers were crying and banging their hands on the counter while talking to customer service representative Allabough. Unfortunately, Allabough couldn’t change my flight in the system. At the same time, I was on the phone with an American Airlines customer service representative named Solomon, who said he couldn’t make the change either. So, I decided to take an ONYA Voyages train from Casablanca to Marrakech to reach my destination on Friday, June 26. It turned out to be an unpredictable trip.

The flight was fine and the crew awesome. The problem is ORD and AA. Computers went down, ORD fell apart and a 40 min flight turned into a 3 hour trip. Guess the answer is to not try and fly to ORD after noon. But, as I said, crew was awesome and did everything they could to lesson the flight time.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

This flight never occurred because AA couldn’t get their act together.

Terrible. Cancelled my original flight. It made getting a boarding pass difficult. The AA employee (in a loud voice, so everyone around could hear) griped at me for not getting a boarding pass 24 hours before. I asked how I was supposed to do that when I had no idea what flight I was going to be on. She said (loudly), “Talk to AA customer service, not me!” I could certainly tell serving customers was not important to her. Our new flight was set to a completely different city. We had to change our rental car, and the price went way up. It took 2-1/2 hours to get checked in. By then our new flight had left. We ended up on stand by and had to split up the family to get to our destination. It cost us the whole first day of the trip. AA needs to employ people who actually care about doing a good job. I suppose those people are getting harder to find, but atleast try.

Am still mad at American airlines. You should know it's us travel nurses who are your customers and you treat us like nonsense it's not ok. American airlines took my money, no refund for whatsoever. A trip that was of 466 and I paid 466 and 833 then they chose for me where to sit and refund my seat choices and gave me expensive seats for 79 USD. Kayak doesn't help at all after booking you are on your own. Skyscanner is better

This was a horrible experience. For a first class experience, my chair was held together by 3M tape - and I have a photo. The crew weren’t very attentive, somewhat dismissive and forgot my drink and snack, the chair reclined about 3 inches on a 6-hour cross country flight. I was also not informed that there was no lounge available in Newark airport because of renovations, so all around this was one of the worst experiences and I would actively avoid both American and Alaska Air going forward.

We’ve all seen the YouTube vids of out of control passengers. But this was an instance of a highly aggressive, bully flight attendant. Yelling in the face of a vet with PTSD who was texting their family. And no , we had not yet been instructed to put our phones in airplane mode. My suggestion is that you should pay whatever difference there is in order to avoid Frontier airlines. Additionally, after 3hrs trying to get customer service frontier offered a $25 voucher. I declined. This experience was so traumatic. To be verbally assaulted and abused by a flight attendant that has the power to say “boo” and I miss my flight ( which was to a family member’s funeral ). Frontier is unsafe and I cannot impress enough how much I discourage anyone ( esp those with any kind of disability like PTSD ) flying on Frontier.

My flight was delayed by two hours which made it so that I would miss my layover flight. I stood in line for customer service for over an hour and when I reached the agent she told me to scan a QR code and it'll give me options. I wasn't offered any help, guidance or compensation, only told that I have options but that I had to figure it all out myself. I was refunded part of the trip and had to buy an expensive same day ticket from another airline in order to get home. I will never fly Frontier again.

We were delayed three times ,and that destroyed my plans, and reservations

Very bad! No good service delayed my second connection flight

The confirmation # CK8GNW and my name was not recognized/in Frontier system. I was able to check in on Frintier app so i went to the Frontier ticket agent, at time they told me that my name/ confirmation did not show up as a purchased ticket. I had to purchase a new ticket that cost $289.00 one way.

Flight was late. Missed connecting in Denver. My new flight is more than 24 hours later and I have no room, vouchers, or compensation, and might also be bumped from the one tomorrow.

Frontier is terrible. Paid for exit row, not given exit row, refused to refund fee.

2 hour delay due to late plane, wrong size plane causing overbooking, and people getting off and on the plane after boarding was completed.

We had to wait in line over an hour just to check our bags. It's a good thing we were so early to the airport. Only one clerk was working and the line was around the corner and down the hall. No good. I felt bad for her. Not sure how she kept her sanity with all the upset people. Then we get to our gate and there is no seating. Everyone was standing. Then I realize it is not a gate at all, we still have to be shuttled to our airplane. Ugh. Then we were late taking off and missed a window of opportunity before the airport runways were shut down for some reason. (not frontier's fault the runway shut down.) The seats on the airline are crammed and there is no cushion. Never had a tighter seating arrangement while flying. My 6' 4" husband was absolutely miserable the whole time with knees digging in to the seat in front of him. You think you are getting a good deal on a ticket, and then wham! I had to pay 75 dollars for our checked bags and 75 dollars for a carry on. No other airline does that!!! And also, there is a 40 pound weight limit on checked bags... Would have been cheaper flying with another airline, and I would have at least gotten a snack and drink. Was thankful for the tiny cup of water at least.

This was one of the first frontier airline flights this spring that wasn't delayed. It actually left on time. Some of the flight crew did not look happy, they didn't smile when the passengers were boarding or getting off the plane, and the passengers initiated greetings, not the staff. To me this was an odd experience to have with any flight/airline. I had a bad experience booking this flight. The price didn't solidify until late hours into the night. Ever time I purchased the ticket, I either received a denial email or an error because the price has changed, but it was never reflected on the flyfrontier or kayak websites until way after midnight on the date of travel. This caused me anxiety and irritation with the websites. Then I noticed a mishap with my name on my voucher as I went to check in, it was incorrect. When I proceeded to correct it, Frontier had no easy, let alone free, way to remedy it. I couldn't correct my name without a $75 charge, I couldn't cancel my voucher to repurchase it with the correct name without a $100 charge, because it was too close to departure. Then calling frontier was nearly impossible to remedy the situation with a human. It's already difficult to want to choose frontier because of all the upcharges, but you feel kinda trapped into doing so because it's the more affordable airline.

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