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Cheap flights from Seattle to Knoxville from $137

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 10/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Knoxville

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 am - 1:11 pm
SEA
-
TYS
27h 11m
1 stop
Multiple Airlines Logo
6:30 am - 9:51 am
TYS
-
SEA
30h 21m
1 stop
$303Multiple Airlines
Sat, Oct 3 - Sun, Oct 11
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 - Sun, Sep 27
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
American Airlines Logo
1:52 pm - 11:45 pm
SEA
-
TYS
6h 53m
1 stop
American Airlines Logo
6:51 pm - 11:51 pm
TYS
-
SEA
8h 00m
1 stop
$355American Airlines
Tue, Jan 5 - Thu, Jan 14
American Airlines Logo
12:04 pm - 11:22 pm
SEA
-
TYS
8h 18m
1 stop
American Airlines Logo
12:53 pm - 6:06 pm
TYS
-
SEA
8h 13m
1 stop
$355American Airlines
Wed, Oct 7 - Wed, Oct 21
United Airlines Logo
7:00 am - 6:15 pm
SEA
-
TYS
8h 15m
1 stop
United Airlines Logo
4:50 pm - 9:31 pm
TYS
-
SEA
7h 41m
1 stop
$355United Airlines
Tue, Sep 1 - Sat, Sep 5
United Airlines Logo
7:00 am - 6:17 pm
SEA
-
TYS
8h 17m
1 stop
United Airlines Logo
6:02 pm - 10:43 pm
TYS
-
SEA
7h 41m
1 stop
$355United Airlines
Wed, Sep 2 - Sat, Sep 5
Delta Logo
6:00 am - 3:40 pm
SEA
-
TYS
6h 40m
1 stop
Delta Logo
6:13 pm - 11:58 pm
TYS
-
SEA
8h 45m
1 stop
$355Delta
Wed, Sep 16 - Tue, Sep 22
Delta Logo
6:00 am - 6:16 pm
SEA
-
TYS
9h 16m
1 stop
Delta Logo
4:37 pm - 11:52 pm
TYS
-
SEA
10h 15m
1 stop
$355Delta
Tue, Oct 6 - Tue, Oct 20
Delta Logo
6:00 am - 5:28 pm
SEA
-
TYS
8h 28m
1 stop
Delta Logo
11:45 am - 6:45 pm
TYS
-
SEA
10h 00m
1 stop
$355Delta
Wed, Sep 16 - Mon, Sep 21

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Frontier flights from Seattle to Knoxville

Our best Frontier deals on Seattle to Knoxville flight tickets
Frontier
Aug 11
SEA2:22 pmSeattle/Tacoma Intl
26h 02m
1 stop
TYS7:24 pmKnoxville McGhee Tyson
Aug 17
TYS8:19 pmKnoxville McGhee Tyson
16h 00m
1 stop
SEA9:19 amSeattle/Tacoma Intl
$354
Frontier
Aug 6
SEA7:06 pmSeattle/Tacoma Intl
21h 18m
1 stop
TYS7:24 pmKnoxville McGhee Tyson
Aug 12
TYS8:19 pmKnoxville McGhee Tyson
15h 45m
1 stop
SEA9:04 amSeattle/Tacoma Intl
$406
Frontier
Jul 28
SEA12:35 pmSeattle/Tacoma Intl
27h 49m
1 stop
TYS7:24 pmKnoxville McGhee Tyson
Aug 3
TYS8:19 pmKnoxville McGhee Tyson
15h 58m
1 stop
SEA9:17 amSeattle/Tacoma Intl
$453

American Airlines flights from Seattle to Knoxville

Our best American Airlines deals on Seattle to Knoxville flight tickets
American Airlines
Sep 1
SEA11:16 pmSeattle/Tacoma Intl
9h 02m
1 stop
TYS11:18 amKnoxville McGhee Tyson
Sep 6
TYS11:57 amKnoxville McGhee Tyson
9h 50m
1 stop
SEA6:47 pmSeattle/Tacoma Intl
$364
American Airlines
Aug 19
SEA11:16 pmSeattle/Tacoma Intl
9h 02m
1 stop
TYS11:18 amKnoxville McGhee Tyson
Aug 29
TYS1:53 pmKnoxville McGhee Tyson
9h 04m
1 stop
SEA7:57 pmSeattle/Tacoma Intl
$387
American Airlines
Aug 1
SEA5:05 amSeattle/Tacoma Intl
8h 36m
1 stop
TYS4:41 pmKnoxville McGhee Tyson
Aug 8
TYS7:59 amKnoxville McGhee Tyson
7h 50m
1 stop
SEA12:49 pmSeattle/Tacoma Intl
$581

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 July 27, 2026.
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

Cheapest round-trip

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 10/3

7:00 am-1:11 pm

1 stop27h 11m

Knoxville McGhee Tyson

Sun 10/11

6:30 am-9:51 am

1 stop30h 21m

$303

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 9/9

7:00 am-1:44 pm

1 stop27h 44m

Knoxville McGhee Tyson

Sun 9/27

7:00 am-9:42 am

2 stops53h 42m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 9/9

4:27 pm-1:44 pm

1 stop18h 17m

Knoxville McGhee Tyson

Mon 9/21

6:30 am-9:42 am

1 stop30h 12m

$311
Quickest round-trip

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 1/5

1:52 pm-11:45 pm

1 stop6h 53m

Knoxville McGhee Tyson

Thu 1/14

6:51 pm-11:51 pm

1 stop8h 00m

$355

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 10/7

12:04 pm-11:22 pm

1 stop8h 18m

Knoxville McGhee Tyson

Wed 10/21

12:53 pm-6:06 pm

1 stop8h 13m

$355

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 9/1

7:00 am-6:15 pm

1 stop8h 15m

Knoxville McGhee Tyson

Sat 9/5

4:50 pm-9:31 pm

1 stop7h 41m

$355

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 9/2

7:00 am-6:17 pm

1 stop8h 17m

Knoxville McGhee Tyson

Sat 9/5

6:02 pm-10:43 pm

1 stop7h 41m

$355

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 9/16

6:00 am-3:40 pm

1 stop6h 40m

Knoxville McGhee Tyson

Tue 9/22

6:13 pm-11:58 pm

1 stop8h 45m

$355

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 10/6

6:00 am-6:16 pm

1 stop9h 16m

Knoxville McGhee Tyson

Tue 10/20

4:37 pm-11:52 pm

1 stop10h 15m

$355

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 9/16

6:00 am-5:28 pm

1 stop8h 28m

Knoxville McGhee Tyson

Mon 9/21

11:45 am-6:45 pm

1 stop10h 00m

$355

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 typical price of a round-trip flight between Seattle and Knoxville?

Prices are currently low for flights on this route.

Typical prices usually range from $456 to $566.
The lowest price recently found on this route was $303.

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 $493. 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 $525.

How far in advance should I book a flight from Seattle 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 $558 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 $388 on momondo.

How have Seattle to Knoxville flight prices changed over time?

As of July 2026, prices for Seattle to Knoxville flights are approximately 32% 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

Fastest flight time

6h 35m

Direct flights

None
The fastest flight from Seattle to Knoxville takes 6h 35m
There are no direct flights from Seattle to Knoxville. There are no popular flight routes from Seattle to Knoxville.
Search flight deals

Frequently asked questions about flying from Seattle to Knoxville

  • 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 35m.

  • 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
DeltaPriceFrom $323Free CancellationRating
7.8
8,480 reviews
Search Delta flights
United AirlinesPriceFrom $366Free CancellationRating
7.4
10,046 reviews
Search United Airlines flights
American AirlinesPriceFrom $377Free CancellationRating
7.1
11,841 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $641Free CancellationRating
7.9
12,721 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
Alcoa
Maryville
Crossville
Murphy
Oak Ridge
Kodak
Newport
Lenoir City
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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