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St. Louis

$264+ Cheap flights from Sioux Falls to St. Louis (FSD - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — STL
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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Cheap flight deals from Sioux Falls to St. Louis

Cheapest flights from Sioux Falls to St. Louis
Explore the most affordable flight options available from Sioux Falls to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 12, 2026.

This American Airlines deal was found by Cheapflights users on 2/11. 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 2/267:42 pm
FSD
-
STL
1 stop4h 06m
American Airlines
Mon 3/26:36 pm
STL
-
FSD
1 stop4h 27m
American Airlines
Deal found 2/11$264
This Delta deal was found by Cheapflights users on 2/10. 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 2/255:00 am
FSD
-
STL
1 stop5h 43m
Delta
Sun 3/16:10 am
STL
-
FSD
1 stop3h 58m
Delta
Deal found 2/10$269
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 2/243:15 pm
FSD
-
STL
1 stop5h 50m
United Airlines
Sat 2/286:25 am
STL
-
FSD
1 stop4h 21m
United Airlines
Deal found 2/8$274
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Sun 3/12:16 pm
FSD
-
STL
1 stop22h 53m
Frontier
Wed 3/45:18 pm
STL
-
FSD
1 stop20h 03m
Frontier
Deal found 2/9$293
This American Airlines deal was found by Cheapflights users on 2/9. 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 2/197:42 pm
FSD
-
STL
1 stop4h 06m
American Airlines
Sat 2/218:00 am
STL
-
FSD
1 stop5h 33m
American Airlines
Deal found 2/9$299
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Fri 2/276:45 pm
FSD
-
STL
1 stop4h 14m
United Airlines
Sun 3/16:00 pm
STL
-
FSD
1 stop5h 49m
United Airlines
Deal found 2/10$317
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Fri 2/137:40 am
FSD
-
STL
1 stop6h 49m
United Airlines
Sun 2/152:45 pm
STL
-
FSD
1 stop5h 54m
United Airlines
Deal found 2/9$319
This United Airlines deal was found by Cheapflights users on 2/10. 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 3/49:00 am
FSD
-
STL
1 stop7h 58m
United Airlines
Fri 3/66:05 pm
STL
-
FSD
1 stop5h 39m
United Airlines
Deal found 2/10$348
This United Airlines deal was found by Cheapflights users on 2/11. 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 2/189:00 am
FSD
-
STL
1 stop7h 58m
United Airlines
Sat 2/216:25 am
STL
-
FSD
1 stop4h 21m
United Airlines
Deal found 2/11$359
This Delta deal was found by Cheapflights users on 2/11. 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 3/45:00 am
FSD
-
STL
1 stop5h 43m
Delta
Fri 3/65:29 pm
STL
-
FSD
1 stop5h 26m
Delta
Deal found 2/11$368
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Sat 2/143:15 pm
FSD
-
STL
1 stop3h 59m
United Airlines
Wed 2/186:00 pm
STL
-
FSD
1 stop5h 44m
United Airlines
Deal found 2/8$369

Find flight deals from Sioux Falls to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Sioux Falls (FSD) to St. Louis (STL). 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 February 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$264
(American Airlines)

Popular in

July

Cheapest in

September

Average price

$298
Provider with most accurate pricing for Sioux Falls Joe Foss Field-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sioux Falls Joe Foss Field-Lambert-St Louis flights.
Search Deals
From Sioux Falls Joe Foss Field to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux Falls to St. Louis 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 February 12, 2026.
Use the filters below to find and compare flights from Sioux Falls to St. Louis that are best for you.

Fly from

Sioux Falls

Fly to

St. Louis

Route

Depart

Return

Price

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 2/26

7:42 pm-11:48 pm

1 stop4h 06m

Lambert-St Louis

Mon 3/2

6:36 pm-11:03 pm

1 stop4h 27m

$264

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 2/25

5:00 am-10:43 am

1 stop5h 43m

Lambert-St Louis

Sun 3/1

6:10 am-10:08 am

1 stop3h 58m

$269

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Tue 2/24

3:15 pm-9:05 pm

1 stop5h 50m

Lambert-St Louis

Sat 2/28

6:25 am-10:46 am

1 stop4h 21m

$274

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 3/25

7:42 pm-11:44 pm

1 stop4h 02m

Lambert-St Louis

Sun 3/29

6:00 am-11:38 am

1 stop5h 38m

$274

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Sun 3/1

2:16 pm-1:09 pm

1 stop22h 53m

Lambert-St Louis

Wed 3/4

5:18 pm-1:21 pm

1 stop20h 03m

$293

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 2/27

6:45 pm-10:59 pm

1 stop4h 14m

Lambert-St Louis

Sun 3/1

6:00 pm-11:49 pm

1 stop5h 49m

$317

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 3/4

9:00 am-4:58 pm

1 stop7h 58m

Lambert-St Louis

Fri 3/6

6:05 pm-11:44 pm

1 stop5h 39m

$348

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 3/23

2:06 pm-8:51 am

1 stop18h 45m

Lambert-St Louis

Wed 3/25

6:00 am-11:38 am

1 stop5h 38m

$387

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 3/25

9:14 pm-10:02 pm

1 stop24h 48m

Lambert-St Louis

Sun 3/29

8:06 pm-7:59 pm

2 stops23h 53m

$425

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 2/27

1:59 pm-1:56 pm

1 stop23h 57m

Lambert-St Louis

Sun 3/1

10:11 pm-1:57 pm

2 stops15h 46m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

Showing 1-10 of 12 results
1
2

Compare providers for flights from Sioux Falls to St. Louis

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 Sioux Falls to St. Louis in February.
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 Sioux Falls-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sioux Falls-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sioux Falls-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sioux Falls-St. Louis 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 Sioux Falls-St. Louis 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 Sioux Falls to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Sioux Falls 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 Sioux Falls to St. Louis

What is the cheapest month to book a flight from Sioux Falls to St. Louis?

Currently, February is the cheapest month in which you can book a flight from Sioux Falls to St. Louis (average of $225). Flying from Sioux Falls to St. Louis in November is currently the most expensive (average of $418). 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 Sioux Falls to St. Louis?

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated February 12, 2026.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Sioux Falls to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,179 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,179 reviews
Delta
7.9
Good
8,179 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,276 reviews
Delta
7.9
Good
8,179 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,267 reviews
Delta
7.9
Good
8,179 reviews

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Sioux Falls to St. Louis. 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 Sioux Falls to St. Louis?

    Departing from Sioux Falls to St. Louis will take you 4h 06m. There are 470 mi between Sioux Falls and St. Louis. 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 Sioux Falls to St. Louis round-trip?

    Our cheapest airline available from Sioux Falls to St. Louis is Delta. Our recent data shows that you can find tickets from as low as $228 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $243 and $268 round-trip. Delta is currently priced 33% below the average price you’ll pay for this route.

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

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

  • How can I find direct flights from Sioux Falls to St. Louis?

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

  • Can I find deals for business class flights from Sioux Falls to St. Louis?

    Yes. Cheapflights offers flight deals from Sioux Falls to St. Louis 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 Sioux Falls to St. Louis?

    Currently, February is the cheapest month in which you can book a flight from Sioux Falls to St. Louis (average of $225). Flying from Sioux Falls to St. Louis in November is currently the most expensive (average of $418). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Sioux Falls to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Sioux Falls to St. Louis

Discover the top 3 airlines that operate flights from Sioux Falls to St. Louis. 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 February 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$228Average$319FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$243Average$289FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$268Average$309FlexibilityNo cancel feeOn-time69%

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