TYS - FSD

$219 Find Cheap Flights from Knoxville to Sioux Falls

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Sioux Falls departing on 4/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sioux Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Sioux Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Sioux Falls, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$219
Typical prices: $341-$315
Allegiant Air
Thu 4/30Mon 5/4
TYS - FSD • 1 stop
Top airlines
Cheapest • from $219 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Knoxville and Sioux Falls. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $399 (round-trip)
Shortest trip • 5h 09m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 32% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sioux Falls!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Knoxville to Sioux Falls (TYS-FSD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to Sioux Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Knoxville to Sioux Falls

Thu, Apr 30 - Mon, May 4
Allegiant Air Logo
9:25 pm - 5:21 pm
TYS
-
FSD
20h 56m
1 stop
Allegiant Air Logo
10:45 am - 9:48 pm
FSD
-
TYS
10h 03m
1 stop
$219Allegiant Air
Thu, Apr 30 - Mon, May 4
Multiple Airlines Logo
9:25 pm - 5:21 pm
TYS
-
FSD
20h 56m
1 stop
Multiple Airlines Logo
6:38 pm - 10:36 am
FSD
-
TYS
38h 58m
2 stops
$269Multiple Airlines
Tue, May 12 - Tue, May 19
American Airlines Logo
4:09 pm - 9:54 pm
TYS
-
FSD
6h 45m
1 stop
American Airlines Logo
5:28 pm - 11:56 pm
FSD
-
TYS
5h 28m
1 stop
$317American Airlines
Tue, May 12 - Tue, May 19
American Airlines Logo
12:11 pm - 9:54 pm
TYS
-
FSD
10h 43m
2 stops
American Airlines Logo
5:28 pm - 11:56 pm
FSD
-
TYS
5h 28m
1 stop
$322American Airlines
Fri, Aug 28 - Sat, Aug 29
United Airlines Logo
4:56 pm - 11:50 pm
TYS
-
FSD
7h 54m
1 stop
United Airlines Logo
11:17 am - 4:59 pm
FSD
-
TYS
4h 42m
1 stop
$324United Airlines
Fri, Aug 28 - Sun, Aug 30
Delta Logo
4:00 pm - 10:09 pm
TYS
-
FSD
7h 09m
1 stop
Delta Logo
8:15 am - 4:34 pm
FSD
-
TYS
7h 19m
1 stop
$329Delta
Fri, Aug 28 - Sun, Aug 30
Delta Logo
6:15 pm - 10:46 pm
TYS
-
FSD
5h 31m
1 stop
Delta Logo
5:15 am - 1:24 pm
FSD
-
TYS
7h 09m
2 stops
$334Delta
Thu, Apr 30 - Mon, May 4
American Airlines Logo
11:40 am - 7:09 pm
TYS
-
FSD
8h 29m
2 stops
American Airlines Logo
1:41 pm - 11:55 pm
FSD
-
TYS
9h 14m
2 stops
$349American Airlines
Wed, May 13 - Wed, May 20
American Airlines Logo
4:09 pm - 9:54 pm
TYS
-
FSD
6h 45m
1 stop
American Airlines Logo
1:41 pm - 11:59 pm
FSD
-
TYS
9h 18m
2 stops
$362American Airlines
Tue, May 12 - Tue, May 19
American Airlines Logo
12:11 pm - 9:54 pm
TYS
-
FSD
10h 43m
2 stops
American Airlines Logo
1:41 pm - 11:59 pm
FSD
-
TYS
9h 18m
2 stops
$367American Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to Sioux Falls flights

Get data-powered insights and trends into flights from Knoxville to Sioux Falls to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Knoxville to Sioux Falls?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Knoxville to Sioux Falls departing in April.

What is the cheapest month to fly from Knoxville to Sioux Falls?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Sioux Falls, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Knoxville to Sioux Falls is February, where tickets cost $269 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $517 and $494 respectively.

Good to know

Low seasonFebruary
Cheapest flight$219
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Knoxville to Sioux Falls

When to book flights from Knoxville to Sioux Falls

Are your dates flexible? Find out the best times to travel from Knoxville to Sioux Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Knoxville to Sioux Falls

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

    In the last 3 days, the lowest price for a flight from Knoxville to Sioux Falls was $219 for a round-trip ticket.

  • Do I need a passport to fly between Knoxville and Sioux Falls?

    No

  • Which airports will I be using when flying from Knoxville to Sioux Falls?

    Knoxville and Sioux Falls are both served by 1 main airport. You will leave Knoxville from Knoxville McGhee Tyson and will be arriving at Sioux Falls Joe Foss Field.

  • Which aircraft models fly most regularly from Knoxville to Sioux Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Knoxville to Sioux Falls?

    Star Alliance, and oneworld are the airline alliances operating flights between Knoxville and Sioux Falls, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Knoxville to Sioux Falls, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Knoxville to Sioux Falls are United Airlines and American Airlines. With an average price for the route of $408 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $434 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Knoxville to Sioux Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Knoxville to Sioux Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Knoxville to Sioux Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sioux Falls from Knoxville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Knoxville to Sioux Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sioux Falls with an airline and back to Knoxville with another airline. Booking your flights between Knoxville and FSD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Knoxville to Sioux Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sioux Falls from Knoxville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Knoxville to Sioux Falls

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Sioux Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Knoxville to Sioux Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9605 reviews
8.1Crew
7.3Comfort
6.6Food
7.7Boarding
7.1Entertainment
Airline reviews

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

4.0 OkaySarah, Apr 2026
SCE - ORD
Read more United Airlines reviews

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

Crew was friendly. Seats are too narrow, particularly when a big person is in the adjacent seat, but I understand this is due to smaller planes usually flight into Lincoln. I have experienced several flight delays going out and coming into Lincoln airport, I say maybe 50% or higher of the flights I've taken out of this airport have been delayed.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Great flight. Boarded efficiently. Arrived early at CLT. There was no in flight entertainment on this aircraft. Great crew.

The seat was comfortable. There was a lot of turbulence. If it weren't for that,it would have been okay.

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Packed in plane small uncomfortable seats elbow to elbow nobody wants to be in that situation for the money they paid

Overall flight was ok. Flight attendant was receptive to assisting passengers with tight connections.

Checking in united could not figure out my star alliance gold. Baggage did not get marked priority and didn't receive boarding passes. When got to SFO lounge personal fixed everything Immediately

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

To have arrived on time and not 3 hours late after having already spent $100 to change to an earlier flight, only to arrive back home close to the original flight time.

No gate in Rome. Had stairs. Got separated from my wife in a wheel chair. Customs was a zoo. If AA doesnt have landing rights, it should be advertised.

I almost missed my flight and they helped me out enormously

Business class was very good, one of my best flights

The "on the ground" A/C was not working. It was so hot while waiting to get in the air, a passenger from the rear of the plan declared "I just can't!" and waited in the gangway until time to close the doors. It was miserable. But the crew were champs and had an amazing attitude. I know they were as miserable as we were but didn't let that affect their performance.

The captain announced to the cabin there would be a delay because they observed a "cut" on a tire during precheck that needed to be cleared by maintenance. We were delayed during this inspection and allowed to proceed after maintenance "measured the cut and decided it was acceptable". My complaint is not about the delay or due diligence. I wish the captain had been more generic when making his announcement. I was a nervous wreck all the way to Charlotte worried that we would have a blowout when landing!

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

American Airlines is a miserable experience. It is predictably miserable, in the sense that every time I fly American, I brace myself for the certainty that it will be unpleasant and uncomfortable. But it is unpredictable in the sense that I never know if the flight will be on time or delayed nine hours (both happened to me this week). I never know if I will be able to sit in the seat that I selected when I purchased the ticket or if I will be told by Customer Service (!!!) that I must relocate from first class to a seat in the back of the aircraft with no explanation (both happened to me this week). Will the food be frozen and half defrosted, or scalding hot? Will the drinks be warm? Will the flight attendants be surly and mean? Will the toilets be cramped and foul? Will the seats be narrow and uncomfortable? Will there be a real electric outlet at the seat, or just an unreliable USB-2 port? Will there be enough seats in the boarding lounge or just a few? Will the boarding process be smooth and efficient, or will the gate agents mess it up and delay it needlessly for 30 or 40 minutes? Will the catering and cleaning crew be prompt or will they take an extra 30 minutes? Will the brakes on the aircraft work properly, or will the pilot delay takeoff for four hours while the ground crew attends to what can only be described as routine maintenance that should have been done the night before? I've eexperienced every one of these unpleasant things this year, 2026. The only thing I can reliably count on is that American will find a new way to make the experience of flying as miserable as they possibly can.

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

Information on your arrival and departure airports