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Cheap flights from Seattle to Knoxville from $170

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 4/28. 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

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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
7:12 pm - 3:35 pm
SEA
-
TYS
41h 23m
2 stops
Multiple Airlines Logo
8:32 pm - 9:49 am
TYS
-
SEA
16h 17m
1 stop
$316Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
7:50 pm - 1:59 pm
SEA
-
TYS
15h 09m
1 stop
Multiple Airlines Logo
5:00 pm - 6:35 pm
TYS
-
SEA
52h 35m
2 stops
$325Multiple Airlines
Wed, May 20 - Tue, May 26
Multiple Airlines Logo
7:50 pm - 1:59 pm
SEA
-
TYS
15h 09m
1 stop
Multiple Airlines Logo
8:32 pm - 6:35 pm
TYS
-
SEA
25h 03m
2 stops
$340Multiple Airlines
Wed, May 27 - Mon, Jun 1
Multiple Airlines Logo
8:20 pm - 11:37 pm
SEA
-
TYS
24h 17m
2 stops
Multiple Airlines Logo
8:32 pm - 10:06 am
TYS
-
SEA
16h 34m
1 stop
$358Multiple Airlines
Thu, May 28 - Mon, Jun 1
Multiple Airlines Logo
7:50 pm - 7:33 pm
SEA
-
TYS
20h 43m
1 stop
Multiple Airlines Logo
4:31 pm - 9:49 am
TYS
-
SEA
44h 18m
2 stops
$359Multiple Airlines
Thu, May 7 - Thu, May 14
Frontier Logo
7:50 pm - 7:24 pm
SEA
-
TYS
20h 34m
1 stop
Frontier Logo
8:32 pm - 10:06 am
TYS
-
SEA
16h 34m
1 stop
$367Frontier
Thu, May 28 - Mon, Jun 1
American Airlines Logo
6:00 am - 6:04 pm
SEA
-
TYS
9h 04m
1 stop
American Airlines Logo
6:00 am - 10:48 am
TYS
-
SEA
7h 48m
1 stop
$375American Airlines
Tue, May 5 - Wed, May 6
Multiple Airlines Logo
11:37 am - 10:51 pm
SEA
-
TYS
8h 14m
1 stop
Multiple Airlines Logo
7:24 pm - 10:06 am
TYS
-
SEA
41h 42m
2 stops
$378Multiple Airlines
Mon, May 18 - Fri, May 22
United Airlines Logo
5:02 am - 3:07 pm
SEA
-
TYS
7h 05m
1 stop
United Airlines Logo
6:01 pm - 10:47 pm
TYS
-
SEA
7h 46m
1 stop
$379United Airlines
Tue, May 5 - Thu, May 7
United Airlines Logo
10:52 am - 8:45 pm
SEA
-
TYS
6h 53m
1 stop
United Airlines Logo
3:40 pm - 10:59 pm
TYS
-
SEA
10h 19m
2 stops
$380United Airlines
Tue, May 5 - Wed, May 6

American Airlines flights from Seattle to Knoxville

Our best American Airlines deals on Seattle to Knoxville flight tickets
American Airlines
May 5
SEA6:00 amSeattle/Tacoma Intl
9h 04m
1 stop
TYS6:04 pmKnoxville McGhee Tyson
May 6
TYS6:00 amKnoxville McGhee Tyson
7h 48m
1 stop
SEA10:48 amSeattle/Tacoma Intl
$375
American Airlines
Apr 26
SEA12:59 amSeattle/Tacoma Intl
8h 31m
1 stop
TYS12:30 pmKnoxville McGhee Tyson
Apr 29
TYS4:09 pmKnoxville McGhee Tyson
9h 38m
1 stop
SEA10:47 pmSeattle/Tacoma Intl
$384
American Airlines
May 4
SEA6:00 amSeattle/Tacoma Intl
9h 04m
1 stop
TYS6:04 pmKnoxville McGhee Tyson
May 7
TYS6:00 amKnoxville McGhee Tyson
10h 15m
1 stop
SEA1:15 pmSeattle/Tacoma Intl
$393

Southwest flights from Seattle to Knoxville

Our best Southwest deals on Seattle to Knoxville flight tickets
Southwest
Apr 27
SEA5:15 amSeattle/Tacoma Intl
12h 05m
2 stops
TYS8:20 pmKnoxville McGhee Tyson
Apr 29
TYS7:05 amKnoxville McGhee Tyson
12h 50m
2 stops
SEA4:55 pmSeattle/Tacoma Intl
$406
Southwest
Jul 8
SEA6:30 amSeattle/Tacoma Intl
10h 50m
2 stops
TYS8:20 pmKnoxville McGhee Tyson
Jul 29
TYS2:45 pmKnoxville McGhee Tyson
11h 45m
2 stops
SEA11:30 pmSeattle/Tacoma Intl
$477
Southwest
Sep 4
SEA11:00 pmSeattle/Tacoma Intl
9h 55m
1 stop
TYS11:55 amKnoxville McGhee Tyson
Sep 8
TYS8:00 amKnoxville McGhee Tyson
8h 00m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$482

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 April 10, 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

Mon 5/4

7:12 pm-3:35 pm

2 stops41h 23m

Knoxville McGhee Tyson

Mon 5/11

8:32 pm-9:49 am

1 stop16h 17m

$316

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 5/20

7:50 pm-1:59 pm

1 stop15h 09m

Knoxville McGhee Tyson

Tue 5/26

5:00 pm-6:35 pm

2 stops52h 35m

$325

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Wed 5/27

7:50 pm-1:59 pm

1 stop15h 09m

Knoxville McGhee Tyson

Mon 6/1

8:32 pm-6:35 pm

2 stops25h 03m

$340

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 5/28

8:20 pm-11:37 pm

2 stops24h 17m

Knoxville McGhee Tyson

Mon 6/1

8:32 pm-10:06 am

1 stop16h 34m

$358

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 5/7

7:50 pm-7:33 pm

1 stop20h 43m

Knoxville McGhee Tyson

Thu 5/14

4:31 pm-9:49 am

2 stops44h 18m

$359

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Thu 5/28

7:50 pm-7:24 pm

1 stop20h 34m

Knoxville McGhee Tyson

Mon 6/1

8:32 pm-10:06 am

1 stop16h 34m

$367

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 5/5

6:00 am-6:04 pm

1 stop9h 04m

Knoxville McGhee Tyson

Wed 5/6

6:00 am-10:48 am

1 stop7h 48m

$375

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Mon 5/18

11:37 am-10:51 pm

1 stop8h 14m

Knoxville McGhee Tyson

Fri 5/22

7:24 pm-10:06 am

2 stops41h 42m

$378
Quickest round-trip

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 5/5

5:02 am-3:07 pm

1 stop7h 05m

Knoxville McGhee Tyson

Thu 5/7

6:01 pm-10:47 pm

1 stop7h 46m

$379

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

Tue 5/5

10:52 am-8:45 pm

1 stop6h 53m

Knoxville McGhee Tyson

Wed 5/6

3:40 pm-10:59 pm

2 stops10h 19m

$380

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?

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 $458. 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 $550 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 April 2026, prices for Seattle to Knoxville flights are approximately 122% 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 54m

Direct flights

None
The fastest flight from Seattle to Knoxville takes 6h 54m
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 54m.

  • 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
2,997 reviews
Search Frontier flights
American AirlinesPriceFrom $308Free CancellationRating
7.1
11,562 reviews
Search American Airlines flights
DeltaPriceFrom $356Free CancellationRating
7.9
8,394 reviews
Search Delta flights
United AirlinesPriceFrom $360Free CancellationRating
7.4
9,559 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $483Free CancellationRating
7.9
12,202 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
Crossville
Alcoa
Murphy
Oak Ridge
Newport
Lenoir City
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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