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Cheap flights from Seattle to Knoxville from $90

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 11/12. 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 (SEA-TYS)

Cheap round-trip flights

Frontier Logo
6:12 am - 7:50 pmSEA-TYS
10h 38m1 stop
Frontier Logo
8:40 pm - 12:30 amTYS-SEA
6h 50m1 stop
$156Frontier
Find Deal
Thu, Sep 4 - Thu, Sep 11
Frontier Logo
6:12 am - 7:45 pmSEA-TYS
10h 33m1 stop
Frontier Logo
8:40 pm - 12:30 amTYS-SEA
6h 50m1 stop
$245Frontier
Find Deal
Mon, Sep 22 - Thu, Sep 25
Logo
4:26 pm - 1:23 pmSEA-TYS
17h 57m1 stop
Logo
7:00 am - 7:48 pmTYS-SEA
15h 48m1 stop
$250
Find Deal
Thu, Oct 23 - Sun, Oct 26
American Airlines Logo
1:30 pm - 11:51 pmSEA-TYS
7h 21m1 stop
American Airlines Logo
6:22 pm - 10:59 pmTYS-SEA
7h 37m1 stop
$309American Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
Delta Logo
7:50 am - 8:06 pmSEA-TYS
9h 16m1 stop
Delta Logo
1:00 pm - 8:20 pmTYS-SEA
10h 20m1 stop
$339Delta
Find Deal
Tue, Sep 2 - Tue, Sep 9
American Airlines Logo
11:30 pm - 11:30 amSEA-TYS
9h 00m1 stop
American Airlines Logo
5:30 am - 10:51 amTYS-SEA
8h 21m1 stop
$369American Airlines
Find Deal
Fri, Aug 29 - Mon, Sep 1
Delta Logo
11:11 pm - 10:09 amSEA-TYS
7h 58m1 stop
Delta Logo
12:01 pm - 4:14 pmTYS-SEA
7h 13m1 stop
$374Delta
Find Deal
Fri, Sep 26 - Tue, Sep 30
United Airlines Logo
7:00 am - 5:00 pmSEA-TYS
7h 00m1 stop
United Airlines Logo
9:55 am - 3:51 pmTYS-SEA
8h 56m1 stop
$378United Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
Alaska Airlines Logo
12:33 am - 1:12 pmSEA-TYS
9h 39m1 stop
Alaska Airlines Logo
6:00 am - 11:34 amTYS-SEA
8h 34m1 stop
$409Alaska Airlines
Find Deal
Thu, Sep 4 - Mon, Sep 8
United Airlines Logo
5:02 am - 3:10 pmSEA-TYS
7h 08m1 stop
United Airlines Logo
10:51 am - 11:15 pmTYS-SEA
15h 24m2 stops
$414United Airlines
Find Deal
Wed, Sep 24 - Thu, Oct 2

American Airlines flights from Seattle to Knoxville

Our best American Airlines deals on Seattle to Knoxville flight tickets
American Airlines
Oct 2
SEA1:30 pmSeattle/Tacoma Intl
7h 21m
1 stop
TYS11:51 pmKnoxville McGhee Tyson
Oct 6
TYS6:22 pmKnoxville McGhee Tyson
7h 37m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$309
Find similar
American Airlines
Aug 29
SEA11:30 pmSeattle/Tacoma Intl
9h 00m
1 stop
TYS11:30 amKnoxville McGhee Tyson
Sep 1
TYS5:30 amKnoxville McGhee Tyson
8h 21m
1 stop
SEA10:51 amSeattle/Tacoma Intl
$369
Find similar
American Airlines
Sep 12
SEA11:38 pmSeattle/Tacoma Intl
7h 18m
1 stop
TYS9:56 amKnoxville McGhee Tyson
Sep 19
TYS12:15 pmKnoxville McGhee Tyson
9h 13m
1 stop
SEA6:28 pmSeattle/Tacoma Intl
$384
Find similar

United Airlines flights from Seattle to Knoxville

Our best United Airlines deals on Seattle to Knoxville flight tickets
United Airlines
Sep 13
SEA7:00 amSeattle/Tacoma Intl
7h 00m
1 stop
TYS5:00 pmKnoxville McGhee Tyson
Sep 20
TYS9:55 amKnoxville McGhee Tyson
8h 56m
1 stop
SEA3:51 pmSeattle/Tacoma Intl
$378
Find similar
United Airlines
Sep 24
SEA5:02 amSeattle/Tacoma Intl
7h 08m
1 stop
TYS3:10 pmKnoxville McGhee Tyson
Oct 2
TYS10:51 amKnoxville McGhee Tyson
15h 24m
2 stops
SEA11:15 pmSeattle/Tacoma Intl
$414
Find similar
United Airlines
Dec 10
SEA5:05 amSeattle/Tacoma Intl
7h 02m
1 stop
TYS3:07 pmKnoxville McGhee Tyson
Dec 15
TYS2:30 pmKnoxville McGhee Tyson
10h 58m
2 stops
SEA10:28 pmSeattle/Tacoma Intl
$426
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 August 16, 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

Thu 9/4

6:12 am-7:50 pm

1 stop10h 38m

Knoxville McGhee Tyson

Thu 9/11

8:40 pm-12:30 am

1 stop6h 50m

$156

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Mon 9/22

6:12 am-7:45 pm

1 stop10h 33m

Knoxville McGhee Tyson

Thu 9/25

8:40 pm-12:30 am

1 stop6h 50m

$245

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 10/23

4:26 pm-1:23 pm

1 stop17h 57m

Knoxville McGhee Tyson

Sun 10/26

7:00 am-7:48 pm

1 stop15h 48m

$250

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 10/2

1:30 pm-11:51 pm

1 stop7h 21m

Knoxville McGhee Tyson

Mon 10/6

6:22 pm-10:59 pm

1 stop7h 37m

$309

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 9/2

7:50 am-8:06 pm

1 stop9h 16m

Knoxville McGhee Tyson

Tue 9/9

1:00 pm-8:20 pm

1 stop10h 20m

$339

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 8/29

11:30 pm-11:30 am

1 stop9h 00m

Knoxville McGhee Tyson

Mon 9/1

5:30 am-10:51 am

1 stop8h 21m

$369

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Fri 9/26

11:11 pm-10:09 am

1 stop7h 58m

Knoxville McGhee Tyson

Tue 9/30

12:01 pm-4:14 pm

1 stop7h 13m

$374

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Sat 9/13

7:00 am-5:00 pm

1 stop7h 00m

Knoxville McGhee Tyson

Sat 9/20

9:55 am-3:51 pm

1 stop8h 56m

$378

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 9/4

12:33 am-1:12 pm

1 stop9h 39m

Knoxville McGhee Tyson

Mon 9/8

6:00 am-11:34 am

1 stop8h 34m

$409

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 9/24

5:02 am-3:10 pm

1 stop7h 08m

Knoxville McGhee Tyson

Thu 10/2

10:51 am-11:15 pm

2 stops15h 24m

$414

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 July is, on average, the cheapest month to fly to Knoxville from Seattle, with most prices found around $539. If you aren’t able to travel during the month of July, then book flights to Knoxville from Seattle during August instead. Flights to Knoxville in August, while not as cheap as those in July, still average around $548.

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 $632 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 $477 on momondo.

How have Seattle to Knoxville flight prices changed over time?

As of August 2025, prices for Seattle to Knoxville flights are approximately 23% 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

Best Price Found

$90

Fastest flight time

7h 00m

Direct flights

None

Airports in Knoxville

1 airport
The best one-way flight to Knoxville from Seattle in the past 72 hours is $90. The best round-trip flight deal from Seattle to Knoxville found on momondo in the last 72 hours is $156.
The fastest flight from Seattle to Knoxville takes 7h 00m
There are no direct flights from Seattle to Knoxville. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Knoxville McGhee Tyson Airport.
There is 1 airport near Knoxville: Knoxville McGhee Tyson (TYS)
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  • 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 7h 00m.

  • 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 $199Free CancellationRating
5.8
3,211 reviews
Search Frontier flights
American AirlinesPriceFrom $362Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $455Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
DeltaPriceFrom $456Free CancellationRating
8.0
7,985 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
Newport
Lenoir City
Alcoa
Oak Ridge
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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