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Sioux Falls

$188+ Cheap flights from Knoxville to Sioux Falls (TYS - FSD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — FSD
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
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Cheap flight deals from Knoxville to Sioux Falls

Cheapest flights from Knoxville to Sioux Falls
Explore the most affordable flight options available from Knoxville to Sioux Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.

This American Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:09 pm
TYS
-
FSD
1 stop6h 45m
American Airlines
Tue 5/265:35 pm
FSD
-
TYS
1 stop5h 21m
American Airlines
Deal found 4/19$305
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:15 pm
TYS
-
FSD
1 stop5h 36m
Delta
Tue 10/205:25 am
FSD
-
TYS
1 stop4h 41m
Delta
Deal found 4/20$357
This American Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:00 am
TYS
-
FSD
1 stop6h 46m
American Airlines
Sun 9/207:19 am
FSD
-
TYS
1 stop4h 12m
American Airlines
Deal found 4/20$374
This American Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:23 pm
TYS
-
FSD
1 stop4h 17m
American Airlines
Tue 10/2012:31 pm
FSD
-
TYS
2 stops9h 59m
American Airlines
Deal found 4/20$394
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:00 am
TYS
-
FSD
1 stop4h 42m
United Airlines
Mon 4/277:39 am
FSD
-
TYS
1 stop4h 35m
United Airlines
Deal found 4/19$402
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:19 pm
TYS
-
FSD
1 stop28h 42m
Allegiant Air
Thu 6/116:51 pm
FSD
-
TYS
1 stop25h 22m
Allegiant Air
Deal found 4/20$404
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:15 am
TYS
-
FSD
1 stop4h 57m
Delta
Mon 4/271:44 pm
FSD
-
TYS
2 stops9h 10m
Delta
Deal found 4/19$407
This American Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:00 am
TYS
-
FSD
2 stops10h 47m
American Airlines
Mon 4/2712:29 pm
FSD
-
TYS
2 stops8h 55m
American Airlines
Deal found 4/20$413

Find flight deals from Knoxville to Sioux Falls

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Sioux Falls (FSD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$305
(American Airlines)

One-way from

$188
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$278
Provider with most accurate pricing for Knoxville McGhee Tyson-Sioux Falls Joe Foss Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Sioux Falls Joe Foss Field flights.
Search Deals
From Knoxville McGhee Tyson to Sioux Falls Joe Foss Field
Search Deals
One-way flight from Knoxville McGhee Tyson to Sioux Falls Joe Foss Field
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Sioux Falls 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, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2026.
Use the filters below to find and compare flights from Knoxville to Sioux Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Tue 5/19

4:09 pm-9:54 pm

1 stop6h 45m

Sioux Falls Joe Foss Field

Tue 5/26

5:35 pm-11:56 pm

1 stop5h 21m

$305

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Thu 10/15

6:15 pm-10:51 pm

1 stop5h 36m

Sioux Falls Joe Foss Field

Tue 10/20

5:25 am-11:06 am

1 stop4h 41m

$357

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Wed 9/16

6:00 am-11:46 am

1 stop6h 46m

Sioux Falls Joe Foss Field

Sun 9/20

7:19 am-12:31 pm

1 stop4h 12m

$374
Quickest round-trip

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Fri 5/29

5:41 pm-9:43 pm

1 stop5h 02m

Sioux Falls Joe Foss Field

Mon 6/1

6:37 pm-12:30 am

1 stop4h 53m

$523
Cheapest one-way

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Sat 5/23

12:54 pm-6:12 pm

1 stop30h 18m

$188

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Fri 6/12

7:00 pm-5:20 pm

1 stop23h 20m

$220

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Fri 6/12

7:30 am-8:17 pm

3 stops13h 47m

$273

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Sun 5/24

6:36 am-12:49 pm

1 stop7h 13m

$279

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Wed 7/29

8:48 am-4:23 pm

1 stop8h 35m

$279

KnoxvilleSioux Falls

TYS - FSD

TYSFSD

Knoxville McGhee Tyson

Tue 7/28

6:36 pm-11:06 pm

1 stop5h 30m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Knoxville to Sioux Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Sioux Falls in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Sioux Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Sioux Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Sioux Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Sioux Falls flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Sioux Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Sioux Falls

Have a flexible travel schedule? Discover the best time to fly to Sioux Falls from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Knoxville to Sioux Falls

What is the cheapest month to book a flight from Knoxville to Sioux Falls?

Currently, February is the cheapest month in which you can book a flight from Knoxville to Sioux Falls (average of $269). Flying from Knoxville to Sioux Falls in September is currently the most expensive (average of $570). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Knoxville to Sioux Falls?

Reviews of airlines servicing Sioux Falls

Get insights into the airlines that provide service to Sioux Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sioux Falls. Reviews last updated April 24, 2026.
Get a feel of what it's like to fly with United Airlines and American Airlines from Knoxville to Sioux Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,643 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,643 reviews
United Airlines
7.4
Good
9,643 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,666 reviews
United Airlines
7.4
Good
9,643 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Sioux Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Knoxville to Sioux Falls?

    Departing from Knoxville to Sioux Falls will take you 5h 36m. The distance from Knoxville to Sioux Falls is about 863 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Knoxville to Sioux Falls round-trip?

    Flying on American Airlines is currently your cheapest option to Sioux Falls, with prices starting at $248. Another option worth looking into is United Airlines, starting at $269 round trip. Users have found that American Airlines is 39% cheaper than the other options available to this destination.

  • Can I find deals for flights from Knoxville to Sioux Falls that include hotel bookings?

    Yes. In addition to deals on Knoxville to Sioux Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Sioux Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Sioux Falls.

  • Can I find deals for business class flights from Knoxville to Sioux Falls?

    Yes. Cheapflights offers flight deals from Knoxville to Sioux Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Sioux Falls?

    Currently, February is the cheapest month in which you can book a flight from Knoxville to Sioux Falls (average of $269). Flying from Knoxville to Sioux Falls in September is currently the most expensive (average of $570). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Sioux Falls?

Book flights to Sioux Falls if you plan to visit one of these locations
Marshall

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Knoxville to Sioux Falls

Discover the top 2 airlines that operate flights from Knoxville to Sioux Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$248Average$434FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$269Average$408FlexibilityNo cancel feeOn-time69%

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