TYS - SEA

$184 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 7/2. 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
$216
Typical prices: $682-$519
Frontier
Mon 6/1Tue 6/9
TYS - SEA • 1 stop
Cheapest one-way
$186
Typical prices: $273-$338
Multiple Airlines
Thu 7/2
TYS - SEA • 1 stop
Top airlines
Cheapest • from $216 (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 8% compared to booking last minute.
Insights
Insights
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Insights
When to travel
Cheapest • 20% price drop
Most popular
Good to know
Good to know
+1
+1
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Good to know
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Start a new search
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We hope you love your trip to Seattle!
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

Mon, Jun 1 - Tue, Jun 9
Frontier Logo
8:32 pm - 10:06 am
TYS
-
SEA
16h 34m
1 stop
Frontier Logo
7:41 pm - 7:37 pm
SEA
-
TYS
20h 56m
1 stop
$216Frontier
Fri, Aug 14 - Wed, Aug 26
Multiple Airlines Logo
8:32 pm - 9:49 am
TYS
-
SEA
16h 17m
1 stop
Multiple Airlines Logo
7:41 pm - 1:49 pm
SEA
-
TYS
15h 08m
1 stop
$309Multiple Airlines
Sun, Aug 16 - Sun, Aug 23
Multiple Airlines Logo
7:00 am - 2:19 pm
TYS
-
SEA
10h 19m
1 stop
Multiple Airlines Logo
8:13 pm - 9:41 pm
SEA
-
TYS
22h 28m
1 stop
$312Multiple Airlines
Mon, Jun 1 - Tue, Jun 9
Multiple Airlines Logo
8:32 pm - 10:06 am
TYS
-
SEA
16h 34m
1 stop
Multiple Airlines Logo
8:12 pm - 10:29 pm
SEA
-
TYS
47h 17m
2 stops
$319Multiple Airlines
Sun, Aug 16 - Sun, Aug 23
Multiple Airlines Logo
2:51 pm - 10:35 am
TYS
-
SEA
46h 44m
2 stops
Multiple Airlines Logo
8:13 pm - 9:41 pm
SEA
-
TYS
22h 28m
1 stop
$321Multiple Airlines
Sun, Aug 16 - Sun, Aug 23
Multiple Airlines Logo
7:00 am - 9:49 am
TYS
-
SEA
29h 49m
1 stop
Multiple Airlines Logo
8:13 pm - 9:41 pm
SEA
-
TYS
22h 28m
1 stop
$322Multiple Airlines
Sun, Aug 16 - Sun, Aug 23
Multiple Airlines Logo
2:51 pm - 10:35 am
TYS
-
SEA
46h 44m
2 stops
Multiple Airlines Logo
8:13 pm - 9:41 pm
SEA
-
TYS
22h 28m
1 stop
$333Multiple Airlines
Mon, Jun 1 - Tue, Jun 9
Frontier Logo
8:32 pm - 6:35 pm
TYS
-
SEA
49h 03m
2 stops
Frontier Logo
7:41 pm - 7:37 pm
SEA
-
TYS
20h 56m
1 stop
$338Frontier
Mon, Jun 1 - Tue, Jun 9
Frontier Logo
8:32 pm - 10:06 am
TYS
-
SEA
16h 34m
1 stop
Frontier Logo
7:41 pm - 7:37 pm
SEA
-
TYS
20h 56m
1 stop
$347Frontier
Fri, Aug 14 - Wed, Aug 26
Multiple Airlines Logo
8:32 pm - 9:49 am
TYS
-
SEA
16h 17m
1 stop
Multiple Airlines Logo
8:13 pm - 1:49 pm
SEA
-
TYS
14h 36m
2 stops
$361Multiple 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.

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

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

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 $436 (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 $598 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 8% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonDecember
Cheapest flight$186
Best time to beat the crowds but there is an average 42% increase in price.
Most popular time to fly with an average 3% 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 $186 for a one-way ticket and $216 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 $564 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 $523 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 8460 reviews
8.1Boarding
7.9Comfort
7.2Food
7.8Entertainment
8.5Crew
Airline reviews

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

8.0 ExcellentMatthew, May 2026
OKC - ATL
Read more Delta reviews

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

Short trip, no food and therefore no expectation for much interaction with staff who were pleasant and professional. My critique is on comfort of the seats. Exit rows and comfort seats do not provide enough personal space for 3 side-by-side seats, especially when in the middle row. Some passengers are not considerate of the middle seat and there should be signs that state something to the effect of: "please consider giving middle seats use of the armrests."

The tray table was broken and the food was terrible.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

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

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Cancelled BOYH legs of our flight home 30 min before initial boarding

Cancelled the flight half hour before boarding. Then cancelled the connecting flight too.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

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

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

Information on your arrival and departure airports