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Cheap flights from Seattle to Knoxville from $142

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 1/9. 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.
Multiple Airlines Logo
11:01 am - 5:02 pmSEA-TYS
27h 01m1 stop
Multiple Airlines Logo
6:30 am - 11:53 amTYS-SEA
8h 23m1 stop
$225Multiple Airlines
Find Deal
jue., dic. 4 - dom., dic. 7
Multiple Airlines Logo
7:23 pm - 4:50 pmSEA-TYS
18h 27m1 stop
Multiple Airlines Logo
7:35 am - 8:00 pmTYS-SEA
15h 25m1 stop
$240Multiple Airlines
Find Deal
jue., ene. 8 - lun., ene. 12
Multiple Airlines Logo
7:23 pm - 10:28 pmSEA-TYS
24h 05m2 stops
Multiple Airlines Logo
7:35 am - 8:00 pmTYS-SEA
15h 25m1 stop
$256Multiple Airlines
Find Deal
jue., ene. 8 - lun., ene. 12
Multiple Airlines Logo
1:09 pm - 7:14 pmSEA-TYS
27h 05m2 stops
Multiple Airlines Logo
6:30 am - 11:53 amTYS-SEA
8h 23m1 stop
$260Multiple Airlines
Find Deal
jue., dic. 4 - dom., dic. 7
Multiple Airlines Logo
9:23 pm - 4:50 pmSEA-TYS
16h 27m1 stop
Multiple Airlines Logo
4:23 pm - 11:47 amTYS-SEA
22h 24m2 stops
$332Multiple Airlines
Find Deal
jue., ene. 8 - dom., ene. 11
Multiple Airlines Logo
6:05 pm - 5:02 pmSEA-TYS
19h 57m1 stop
Multiple Airlines Logo
10:00 am - 8:00 pmTYS-SEA
37h 00m2 stops
$337Multiple Airlines
Find Deal
dom., ene. 4 - dom., ene. 11
Multiple Airlines Logo
9:23 pm - 4:50 pmSEA-TYS
16h 27m1 stop
Multiple Airlines Logo
5:30 pm - 11:21 amTYS-SEA
20h 51m2 stops
$346Multiple Airlines
Find Deal
jue., ene. 8 - sáb., ene. 10
Multiple Airlines Logo
9:45 am - 12:03 pmSEA-TYS
23h 18m2 stops
Multiple Airlines Logo
6:30 am - 11:53 amTYS-SEA
8h 23m1 stop
$361Multiple Airlines
Find Deal
vie., dic. 5 - dom., dic. 7
Multiple Airlines Logo
1:25 pm - 8:39 pmSEA-TYS
28h 14m2 stops
Multiple Airlines Logo
7:35 am - 8:00 pmTYS-SEA
15h 25m1 stop
$375Multiple Airlines
Find Deal
mar., dic. 23 - vie., ene. 9
Multiple Airlines Logo
3:13 pm - 3:03 pmSEA-TYS
20h 50m2 stops
Multiple Airlines Logo
7:35 am - 8:00 pmTYS-SEA
15h 25m1 stop
$376Multiple Airlines
Find Deal
mar., ene. 6 - lun., ene. 12

Frontier flights from Seattle to Knoxville

Our best Frontier deals on Seattle to Knoxville flight tickets
Frontier
Dec 29
SEA6:33 pmSeattle/Tacoma Intl
18h 18m
2 stops
TYS3:51 pmKnoxville McGhee Tyson
Jan 4
TYS4:26 pmKnoxville McGhee Tyson
23h 04m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$356
Find similar
Frontier
Dec 28
SEA1:25 pmSeattle/Tacoma Intl
23h 26m
2 stops
TYS3:51 pmKnoxville McGhee Tyson
Jan 4
TYS4:26 pmKnoxville McGhee Tyson
23h 04m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$385
Find similar
Frontier
Nov 21
SEA1:01 pmSeattle/Tacoma Intl
27h 09m
1 stop
TYS7:10 pmKnoxville McGhee Tyson
Nov 25
TYS4:48 pmKnoxville McGhee Tyson
22h 08m
1 stop
SEA11:56 amSeattle/Tacoma Intl
$386
Find similar

Delta flights from Seattle to Knoxville

Our best Delta deals on Seattle to Knoxville flight tickets
Delta
Jan 6
SEA6:15 amSeattle/Tacoma Intl
8h 01m
1 stop
TYS5:16 pmKnoxville McGhee Tyson
Jan 10
TYS5:40 amKnoxville McGhee Tyson
11h 38m
1 stop
SEA2:18 pmSeattle/Tacoma Intl
$412
Find similar
Delta
Mar 3
SEA9:55 amSeattle/Tacoma Intl
7h 52m
1 stop
TYS8:47 pmKnoxville McGhee Tyson
Mar 4
TYS7:30 amKnoxville McGhee Tyson
9h 50m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$437
Find similar
Delta
Mar 3
SEA5:30 amSeattle/Tacoma Intl
15h 20m
2 stops
TYS11:50 pmKnoxville McGhee Tyson
Mar 4
TYS5:30 amKnoxville McGhee Tyson
7h 37m
1 stop
SEA10:07 amSeattle/Tacoma Intl
$460
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 noviembre 17, 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

jue. 12/4

11:01 am-5:02 pm

1 stop27h 01m

Knoxville McGhee Tyson

dom. 12/7

6:30 am-11:53 am

1 stop8h 23m

$225

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

jue. 1/8

7:23 pm-4:50 pm

1 stop18h 27m

Knoxville McGhee Tyson

lun. 1/12

7:35 am-8:00 pm

1 stop15h 25m

$240

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

jue. 1/8

7:23 pm-10:28 pm

2 stops24h 05m

Knoxville McGhee Tyson

lun. 1/12

7:35 am-8:00 pm

1 stop15h 25m

$256

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

jue. 12/4

1:09 pm-7:14 pm

2 stops27h 05m

Knoxville McGhee Tyson

dom. 12/7

6:30 am-11:53 am

1 stop8h 23m

$260

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

jue. 1/8

9:23 pm-4:50 pm

1 stop16h 27m

Knoxville McGhee Tyson

dom. 1/11

4:23 pm-11:47 am

2 stops22h 24m

$332

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

dom. 1/4

6:05 pm-5:02 pm

1 stop19h 57m

Knoxville McGhee Tyson

dom. 1/11

10:00 am-8:00 pm

2 stops37h 00m

$337

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

jue. 1/8

9:23 pm-4:50 pm

1 stop16h 27m

Knoxville McGhee Tyson

sáb. 1/10

5:30 pm-11:21 am

2 stops20h 51m

$346

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

vie. 12/5

9:45 am-12:03 pm

2 stops23h 18m

Knoxville McGhee Tyson

dom. 12/7

6:30 am-11:53 am

1 stop8h 23m

$361

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

mar. 12/23

1:25 pm-8:39 pm

2 stops28h 14m

Knoxville McGhee Tyson

vie. 1/9

7:35 am-8:00 pm

1 stop15h 25m

$375

SeattleKnoxville

SEA - TYS

SEATYS

Seattle/Tacoma Intl

mar. 1/6

3:13 pm-3:03 pm

2 stops20h 50m

Knoxville McGhee Tyson

lun. 1/12

7:35 am-8:00 pm

1 stop15h 25m

$376

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 $506.

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 $595 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 $447 on momondo.

How have Seattle to Knoxville flight prices changed over time?

As of November 2025, prices for Seattle to Knoxville flights are approximately 93% 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 7h 18m.

  • 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
3,103 reviews
Search Frontier flights
American AirlinesPriceFrom $318Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
United AirlinesPriceFrom $436Free CancellationRating
7.4
9,015 reviews
Search United Airlines flights
DeltaPriceFrom $444Free CancellationRating
7.9
8,008 reviews
Search Delta flights
Alaska AirlinesPriceFrom $483Free CancellationRating
8.0
11,314 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
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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