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Cheap flights from Seattle to Knoxville from $135

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Knoxville departing on 10/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Seattle to Knoxville

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:43 pm - 1:33 pmSEA-TYS
13h 50m1 stop
Multiple Airlines Logo
7:00 am - 7:33 amTYS-SEA
27h 33m1 stop
$267Multiple Airlines
Find Deal
Wed, Oct 22 - Sun, Oct 26
Multiple Airlines Logo
2:22 pm - 5:09 pmSEA-TYS
23h 47m2 stops
Multiple Airlines Logo
7:17 pm - 12:13 pmTYS-SEA
19h 56m1 stop
$307Multiple Airlines
Find Deal
Sun, Nov 2 - Thu, Nov 13
Multiple Airlines Logo
8:43 pm - 1:33 pmSEA-TYS
13h 50m1 stop
Multiple Airlines Logo
8:17 pm - 12:07 pmTYS-SEA
18h 50m1 stop
$325Multiple Airlines
Find Deal
Sat, Oct 18 - Mon, Oct 20
Multiple Airlines Logo
10:00 pm - 9:04 pmSEA-TYS
20h 04m1 stop
Multiple Airlines Logo
8:17 pm - 7:33 amTYS-SEA
14h 16m1 stop
$338Multiple Airlines
Find Deal
Fri, Oct 17 - Sun, Oct 19
American Airlines Logo
12:59 am - 2:29 pmSEA-TYS
11h 30m1 stop
American Airlines Logo
2:59 pm - 11:18 pmTYS-SEA
11h 19m1 stop
$355American Airlines
Find Deal
Sat, Nov 1 - Thu, Nov 13
American Airlines Logo
12:38 am - 2:27 pmSEA-TYS
10h 49m1 stop
American Airlines Logo
2:58 pm - 11:25 pmTYS-SEA
11h 27m1 stop
$435American Airlines
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Thu, Dec 4 - Mon, Dec 8
Delta Logo
1:49 pm - 11:09 pmSEA-TYS
6h 20m1 stop
Delta Logo
6:35 am - 10:54 amTYS-SEA
7h 19m1 stop
$437Delta
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Wed, Nov 19 - Sun, Nov 23
United Airlines Logo
5:05 am - 2:43 pmSEA-TYS
6h 38m1 stop
United Airlines Logo
8:26 am - 4:15 pmTYS-SEA
10h 49m2 stops
$442United Airlines
Find Deal
Tue, Nov 4 - Wed, Nov 5
United Airlines Logo
11:59 pm - 10:15 amSEA-TYS
7h 16m1 stop
United Airlines Logo
11:07 am - 6:27 pmTYS-SEA
10h 20m2 stops
$513United Airlines
Find Deal
Sat, Jan 3 - Thu, Jan 8
Delta Logo
9:55 pm - 9:00 amSEA-TYS
8h 05m1 stop
Delta Logo
5:44 am - 3:50 pmTYS-SEA
13h 06m1 stop
$514Delta
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Tue, Oct 14 - Tue, Oct 28

American Airlines flights from Seattle to Knoxville

Our best American Airlines deals on Seattle to Knoxville flight tickets
American Airlines
Nov 1
SEA12:59 amSeattle/Tacoma Intl
11h 30m
1 stop
TYS2:29 pmKnoxville McGhee Tyson
Nov 13
TYS2:59 pmKnoxville McGhee Tyson
11h 19m
1 stop
SEA11:18 pmSeattle/Tacoma Intl
$355
Find similar
American Airlines
Dec 4
SEA12:38 amSeattle/Tacoma Intl
10h 49m
1 stop
TYS2:27 pmKnoxville McGhee Tyson
Dec 8
TYS2:58 pmKnoxville McGhee Tyson
11h 27m
1 stop
SEA11:25 pmSeattle/Tacoma Intl
$435
Find similar
American Airlines
Nov 3
SEA12:41 amSeattle/Tacoma Intl
7h 43m
1 stop
TYS11:24 amKnoxville McGhee Tyson
Nov 9
TYS2:45 pmKnoxville McGhee Tyson
9h 14m
1 stop
SEA8:59 pmSeattle/Tacoma Intl
$439
Find similar

United Airlines flights from Seattle to Knoxville

Our best United Airlines deals on Seattle to Knoxville flight tickets
United Airlines
Nov 4
SEA5:05 amSeattle/Tacoma Intl
6h 38m
1 stop
TYS2:43 pmKnoxville McGhee Tyson
Nov 5
TYS8:26 amKnoxville McGhee Tyson
10h 49m
2 stops
SEA4:15 pmSeattle/Tacoma Intl
$442
Find similar
United Airlines
Jan 3
SEA11:59 pmSeattle/Tacoma Intl
7h 16m
1 stop
TYS10:15 amKnoxville McGhee Tyson
Jan 8
TYS11:07 amKnoxville McGhee Tyson
10h 20m
2 stops
SEA6:27 pmSeattle/Tacoma Intl
$513
Find similar
United Airlines
Oct 15
SEA10:50 amSeattle/Tacoma Intl
9h 00m
1 stop
TYS10:50 pmKnoxville McGhee Tyson
Oct 21
TYS7:00 amKnoxville McGhee Tyson
7h 31m
1 stop
SEA11:31 amSeattle/Tacoma Intl
$523
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Knoxville that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 2, 2025.
Use the filters below to find and compare flights from Seattle to Knoxville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 10/22

8:43 pm-1:33 pm

1 stop13h 50m

Knoxville McGhee Tyson

Sun 10/26

7:00 am-7:33 am

1 stop27h 33m

$267

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sun 11/2

2:22 pm-5:09 pm

2 stops23h 47m

Knoxville McGhee Tyson

Thu 11/13

7:17 pm-12:13 pm

1 stop19h 56m

$307

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 10/18

8:43 pm-1:33 pm

1 stop13h 50m

Knoxville McGhee Tyson

Mon 10/20

8:17 pm-12:07 pm

1 stop18h 50m

$325

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 10/17

10:00 pm-9:04 pm

1 stop20h 04m

Knoxville McGhee Tyson

Sun 10/19

8:17 pm-7:33 am

1 stop14h 16m

$338

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 11/1

12:59 am-2:29 pm

1 stop11h 30m

Knoxville McGhee Tyson

Thu 11/13

2:59 pm-11:18 pm

1 stop11h 19m

$355

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 12/4

12:38 am-2:27 pm

1 stop10h 49m

Knoxville McGhee Tyson

Mon 12/8

2:58 pm-11:25 pm

1 stop11h 27m

$435

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 11/19

1:49 pm-11:09 pm

1 stop6h 20m

Knoxville McGhee Tyson

Sun 11/23

6:35 am-10:54 am

1 stop7h 19m

$437

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 11/4

5:05 am-2:43 pm

1 stop6h 38m

Knoxville McGhee Tyson

Wed 11/5

8:26 am-4:15 pm

2 stops10h 49m

$442

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 1/3

11:59 pm-10:15 am

1 stop7h 16m

Knoxville McGhee Tyson

Thu 1/8

11:07 am-6:27 pm

2 stops10h 20m

$513

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 10/14

9:55 pm-9:00 am

1 stop8h 05m

Knoxville McGhee Tyson

Tue 10/28

5:44 am-3:50 pm

1 stop13h 06m

$514

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Knoxville from

How to get the cheapest flight ticket from Seattle to Knoxville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Knoxville?

The month of August is, on average, the cheapest month to fly to Knoxville from Seattle, with most prices found around $462. If you aren’t able to travel during the month of August, then book flights to Knoxville from Seattle during July instead. Flights to Knoxville in July, while not as cheap as those in August, still average around $539.

What is the cheapest day to depart on your flight to Knoxville?

The cheapest day to depart from Seattle to Knoxville is on a Tuesday. Travelers who choose to depart for Knoxville on a Tuesday will often find tickets for as low as $596. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Knoxville for around $758.

What is the cheapest time of day to depart on your flight to Knoxville?

In the afternoon is the cheapest time of day to fly from Seattle to Knoxville when you can find flight prices for as low as $189. Flying to Knoxville in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the morning when prices are around $656.

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

You are more likely to see cheaper flights to Knoxville from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $618 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Seattle for as low as $474 on momondo.

How have Seattle to Knoxville flight prices changed over time?

As of October 2025, prices for Seattle to Knoxville flights are approximately 92% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Knoxville

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Knoxville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Knoxville (SEA to TYS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Knoxville

Direct flights

None
There are no direct flights from Seattle to Knoxville. There are no popular flight routes from Seattle to Knoxville.
Search flight deals

  • How far is Seattle/Tacoma Intl to Knoxville McGhee Tyson by plane?

    Seattle/Tacoma Intl and Knoxville McGhee Tyson are 2108.9 mi apart from one another. In terms of flight time, this usually takes a little over 6h 20m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Knoxville McGhee Tyson Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Knoxville McGhee Tyson Airport were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Knoxville McGhee Tyson Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Knoxville McGhee Tyson Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The required travel and health documents for your Knoxville McGhee Tyson Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Knoxville McGhee Tyson Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Seattle to Knoxville?

Best airlines flying from Seattle to Knoxville

Compare and see reviews for airlines that fly from Seattle to Knoxville with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $190Free CancellationRating
5.8
3,155 reviews
Search Frontier flights
American AirlinesPriceFrom $325Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $436Free CancellationRating
7.4
8,933 reviews
Search United Airlines flights
DeltaPriceFrom $444Free CancellationRating
7.9
7,962 reviews
Search Delta flights
Alaska AirlinesPriceFrom $483Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Crossville
Maryville
Murphy
Alcoa
Oak Ridge
Lenoir City
Newport
Kodak
Dandridge
Clinton
Jefferson City
Rockford

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Knoxville?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Knoxville. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Knoxville with flexible booking policies on momondo?

momondo does allow users to show only those flights to Knoxville from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to Knoxville?

momondo provides multiple filters to help you find the best flight to Knoxville from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Knoxville right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Knoxville, momondo offers a useful price alert feature which will track prices for flights to Knoxville from Seattle and alert you when they change.

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