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Cheap flights from Seattle to Knoxville from $143

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 5/9. 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
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.
Frontier Logo
12:42 pm - 3:28 pm
SEA
-
TYS
23h 46m
1 stop
Frontier Logo
4:28 pm - 3:05 pm
TYS
-
SEA
25h 37m
1 stop
$267Frontier
Thu, Apr 9 - Thu, Apr 16
Multiple Airlines Logo
7:12 pm - 3:33 pm
SEA
-
TYS
17h 21m
1 stop
Multiple Airlines Logo
11:26 am - 9:27 am
TYS
-
SEA
25h 01m
2 stops
$357Multiple Airlines
Wed, Apr 22 - Wed, May 13
American Airlines Logo
11:41 am - 11:56 pm
SEA
-
TYS
9h 15m
1 stop
American Airlines Logo
6:54 pm - 12:44 am
TYS
-
SEA
8h 50m
1 stop
$359American Airlines
Wed, Apr 8 - Wed, Apr 15
United Airlines Logo
5:00 am - 3:06 pm
SEA
-
TYS
7h 06m
1 stop
United Airlines Logo
10:49 am - 6:00 pm
TYS
-
SEA
10h 11m
2 stops
$364United Airlines
Wed, Apr 8 - Tue, Apr 14
Southwest Logo
6:00 am - 7:40 pm
SEA
-
TYS
10h 40m
2 stops
Southwest Logo
2:55 pm - 11:35 pm
TYS
-
SEA
11h 40m
2 stops
$369Southwest
Wed, Apr 8 - Tue, Apr 14
American Airlines Logo
6:00 am - 6:13 pm
SEA
-
TYS
9h 13m
1 stop
American Airlines Logo
6:00 am - 1:15 pm
TYS
-
SEA
10h 15m
1 stop
$372American Airlines
Wed, Apr 8 - Thu, Apr 16
United Airlines Logo
8:55 am - 11:03 pm
SEA
-
TYS
11h 08m
2 stops
United Airlines Logo
7:00 am - 11:48 am
TYS
-
SEA
7h 48m
1 stop
$377United Airlines
Wed, Apr 8 - Thu, Apr 16
Multiple Airlines Logo
12:24 pm - 3:25 pm
SEA
-
TYS
24h 01m
1 stop
Multiple Airlines Logo
8:00 am - 9:03 pm
TYS
-
SEA
16h 03m
1 stop
$378Multiple Airlines
Thu, Mar 19 - Thu, Mar 26
Multiple Airlines Logo
6:57 pm - 1:59 pm
SEA
-
TYS
16h 02m
1 stop
Multiple Airlines Logo
8:08 pm - 10:10 am
TYS
-
SEA
17h 02m
1 stop
$382Multiple Airlines
Wed, May 20 - Mon, May 25
United Airlines Logo
5:00 am - 3:06 pm
SEA
-
TYS
7h 06m
1 stop
United Airlines Logo
9:40 am - 6:00 pm
TYS
-
SEA
11h 20m
2 stops
$387United Airlines
Wed, Apr 8 - Wed, Apr 15

Delta flights from Seattle to Knoxville

Our best Delta deals on Seattle to Knoxville flight tickets
Delta
Apr 7
SEA11:45 amSeattle/Tacoma Intl
9h 12m
1 stop
TYS11:57 pmKnoxville McGhee Tyson
Apr 8
TYS11:18 amKnoxville McGhee Tyson
10h 08m
1 stop
SEA6:26 pmSeattle/Tacoma Intl
$447
Delta
May 12
SEA9:35 amSeattle/Tacoma Intl
8h 50m
1 stop
TYS9:25 pmKnoxville McGhee Tyson
May 16
TYS3:00 pmKnoxville McGhee Tyson
10h 28m
1 stop
SEA10:28 pmSeattle/Tacoma Intl
$449
Delta
Apr 7
SEA11:29 pmSeattle/Tacoma Intl
6h 47m
1 stop
TYS9:16 amKnoxville McGhee Tyson
Apr 9
TYS5:24 pmKnoxville McGhee Tyson
7h 51m
1 stop
SEA10:15 pmSeattle/Tacoma Intl
$460

American Airlines flights from Seattle to Knoxville

Our best American Airlines deals on Seattle to Knoxville flight tickets
American Airlines
Apr 8
SEA11:41 amSeattle/Tacoma Intl
9h 15m
1 stop
TYS11:56 pmKnoxville McGhee Tyson
Apr 15
TYS6:54 pmKnoxville McGhee Tyson
8h 50m
1 stop
SEA12:44 amSeattle/Tacoma Intl
$359
American Airlines
Apr 8
SEA6:00 amSeattle/Tacoma Intl
9h 13m
1 stop
TYS6:13 pmKnoxville McGhee Tyson
Apr 16
TYS6:00 amKnoxville McGhee Tyson
10h 15m
1 stop
SEA1:15 pmSeattle/Tacoma Intl
$372
American Airlines
Apr 1
SEA5:30 amSeattle/Tacoma Intl
7h 07m
1 stop
TYS3:37 pmKnoxville McGhee Tyson
Apr 5
TYS5:40 amKnoxville McGhee Tyson
8h 11m
1 stop
SEA10:51 amSeattle/Tacoma Intl
$398

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 February 22, 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

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 4/9

12:42 pm-3:28 pm

1 stop23h 46m

Knoxville McGhee Tyson

Thu 4/16

4:28 pm-3:05 pm

1 stop25h 37m

$267

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 4/22

7:12 pm-3:33 pm

1 stop17h 21m

Knoxville McGhee Tyson

Wed 5/13

11:26 am-9:27 am

2 stops25h 01m

$357

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 4/8

11:41 am-11:56 pm

1 stop9h 15m

Knoxville McGhee Tyson

Wed 4/15

6:54 pm-12:44 am

1 stop8h 50m

$359

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 4/8

5:00 am-3:06 pm

1 stop7h 06m

Knoxville McGhee Tyson

Tue 4/14

10:49 am-6:00 pm

2 stops10h 11m

$364

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 4/8

6:00 am-7:40 pm

2 stops10h 40m

Knoxville McGhee Tyson

Tue 4/14

2:55 pm-11:35 pm

2 stops11h 40m

$369

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 4/8

6:00 am-6:13 pm

1 stop9h 13m

Knoxville McGhee Tyson

Thu 4/16

6:00 am-1:15 pm

1 stop10h 15m

$372

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 4/8

8:55 am-11:03 pm

2 stops11h 08m

Knoxville McGhee Tyson

Thu 4/16

7:00 am-11:48 am

1 stop7h 48m

$377

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 3/19

12:24 pm-3:25 pm

1 stop24h 01m

Knoxville McGhee Tyson

Thu 3/26

8:00 am-9:03 pm

1 stop16h 03m

$378

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 5/20

6:57 pm-1:59 pm

1 stop16h 02m

Knoxville McGhee Tyson

Mon 5/25

8:08 pm-10:10 am

1 stop17h 02m

$382

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 4/8

5:00 am-3:06 pm

1 stop7h 06m

Knoxville McGhee Tyson

Wed 4/15

9:40 am-6:00 pm

2 stops11h 20m

$387

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 $460. If you aren’t able to travel during the month of August, then book flights to Knoxville from Seattle during September instead. Flights to Knoxville in September, while not as cheap as those in August, still average around $490.

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 $548 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 $308 on momondo.

How have Seattle to Knoxville flight prices changed over time?

As of February 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 45m

Direct flights

None
The fastest flight from Seattle to Knoxville takes 6h 45m
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 45m.

  • 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 $209Free CancellationRating
5.7
3,044 reviews
Search Frontier flights
American AirlinesPriceFrom $308Free CancellationRating
7.2
11,339 reviews
Search American Airlines flights
DeltaPriceFrom $356Free CancellationRating
7.9
8,236 reviews
Search Delta flights
United AirlinesPriceFrom $408Free CancellationRating
7.4
9,342 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $483Free CancellationRating
8.0
11,937 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
Maryville
Alcoa
Crossville
Murphy
Oak Ridge
Lenoir City
Newport
Kodak
Dandridge
Jefferson City
Clinton
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.

An easier way to manage your Knoxville trip

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