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Cheap flights from Sioux Falls to St. Louis from $167

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux Falls to St. Louis departing on 7/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Sioux Falls to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:40 pm - 7:23 pm
FSD
-
STL
26h 43m
1 stop
Frontier Logo
8:08 pm - 7:23 pm
STL
-
FSD
23h 15m
1 stop
$251Frontier
Mon, Jul 6 - Tue, Jul 14
Frontier Logo
4:40 pm - 7:23 pm
FSD
-
STL
26h 43m
1 stop
Frontier Logo
8:08 pm - 7:23 pm
STL
-
FSD
23h 15m
1 stop
$261Frontier
Mon, Jul 6 - Tue, Jul 14
American Airlines Logo
5:34 pm - 11:58 pm
FSD
-
STL
6h 24m
1 stop
American Airlines Logo
9:44 am - 4:37 pm
STL
-
FSD
6h 53m
1 stop
$271American Airlines
Wed, Jul 8 - Sat, Jul 11
American Airlines Logo
5:34 pm - 11:58 pm
FSD
-
STL
6h 24m
1 stop
American Airlines Logo
7:02 am - 4:37 pm
STL
-
FSD
9h 35m
2 stops
$276American Airlines
Wed, Jul 8 - Sat, Jul 11
American Airlines Logo
5:35 pm - 11:59 pm
FSD
-
STL
6h 24m
1 stop
American Airlines Logo
7:57 pm - 12:18 am
STL
-
FSD
4h 21m
1 stop
$290American Airlines
Fri, Jun 26 - Fri, Jul 3
United Airlines Logo
6:51 pm - 11:57 pm
FSD
-
STL
5h 06m
1 stop
United Airlines Logo
7:05 pm - 11:31 pm
STL
-
FSD
4h 26m
1 stop
$299United Airlines
Mon, Aug 3 - Mon, Aug 10
American Airlines Logo
5:35 pm - 11:59 pm
FSD
-
STL
6h 24m
1 stop
American Airlines Logo
8:14 pm - 12:20 am
STL
-
FSD
4h 06m
1 stop
$304American Airlines
Fri, Jun 19 - Sun, Jun 28
Frontier Logo
8:08 pm - 7:23 pm
FSD
-
STL
23h 15m
1 stop
Frontier Logo
8:08 pm - 7:23 pm
STL
-
FSD
23h 15m
1 stop
$323Frontier
Mon, Jul 13 - Thu, Jul 16
United Airlines Logo
7:47 am - 12:03 pm
FSD
-
STL
4h 16m
1 stop
United Airlines Logo
1:36 pm - 8:07 pm
STL
-
FSD
6h 31m
1 stop
$341United Airlines
Sat, Aug 29 - Tue, Sep 1
Frontier Logo
8:14 pm - 6:53 pm
FSD
-
STL
22h 39m
1 stop
Frontier Logo
8:08 pm - 3:54 pm
STL
-
FSD
19h 46m
1 stop
$353Frontier
Fri, Jun 26 - Sun, Jul 5

Frontier flights from Sioux Falls to St. Louis

Our best Frontier deals on Sioux Falls to St. Louis flight tickets
Frontier
Jul 6
FSD4:40 pmSioux Falls Joe Foss Field
26h 43m
1 stop
STL7:23 pmLambert-St Louis
Jul 14
STL8:08 pmLambert-St Louis
23h 15m
1 stop
FSD7:23 pmSioux Falls Joe Foss Field
$251
Frontier
Jul 6
FSD4:40 pmSioux Falls Joe Foss Field
26h 43m
1 stop
STL7:23 pmLambert-St Louis
Jul 14
STL8:08 pmLambert-St Louis
23h 15m
1 stop
FSD7:23 pmSioux Falls Joe Foss Field
$261
Frontier
Jul 13
FSD8:08 pmSioux Falls Joe Foss Field
23h 15m
1 stop
STL7:23 pmLambert-St Louis
Jul 16
STL8:08 pmLambert-St Louis
23h 15m
1 stop
FSD7:23 pmSioux Falls Joe Foss Field
$323

United Airlines flights from Sioux Falls to St. Louis

Our best United Airlines deals on Sioux Falls to St. Louis flight tickets
United Airlines
Aug 3
FSD6:51 pmSioux Falls Joe Foss Field
5h 06m
1 stop
STL11:57 pmLambert-St Louis
Aug 10
STL7:05 pmLambert-St Louis
4h 26m
1 stop
FSD11:31 pmSioux Falls Joe Foss Field
$299
United Airlines
Aug 29
FSD7:47 amSioux Falls Joe Foss Field
4h 16m
1 stop
STL12:03 pmLambert-St Louis
Sep 1
STL1:36 pmLambert-St Louis
6h 31m
1 stop
FSD8:07 pmSioux Falls Joe Foss Field
$341
United Airlines
Jun 4
FSD7:40 amSioux Falls Joe Foss Field
4h 31m
1 stop
STL12:11 pmLambert-St Louis
Jun 8
STL5:10 amLambert-St Louis
5h 30m
1 stop
FSD10:40 amSioux Falls Joe Foss Field
$439

momondo 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, momondo users made 832,500 searches. Data last updated June 3, 2026.
Use the filters below to find and compare flights from Sioux Falls to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 7/6

4:40 pm-7:23 pm

1 stop26h 43m

Lambert-St Louis

Tue 7/14

8:08 pm-7:23 pm

1 stop23h 15m

$251

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 7/6

4:40 pm-7:23 pm

1 stop26h 43m

Lambert-St Louis

Tue 7/14

8:08 pm-7:23 pm

1 stop23h 15m

$261

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 7/8

5:34 pm-11:58 pm

1 stop6h 24m

Lambert-St Louis

Sat 7/11

9:44 am-4:37 pm

1 stop6h 53m

$271

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 7/8

5:34 pm-11:58 pm

1 stop6h 24m

Lambert-St Louis

Sat 7/11

7:02 am-4:37 pm

2 stops9h 35m

$276

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 6/26

5:35 pm-11:59 pm

1 stop6h 24m

Lambert-St Louis

Fri 7/3

7:57 pm-12:18 am

1 stop4h 21m

$290
Quickest round-trip

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 8/3

6:51 pm-11:57 pm

1 stop5h 06m

Lambert-St Louis

Mon 8/10

7:05 pm-11:31 pm

1 stop4h 26m

$299

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 6/19

5:35 pm-11:59 pm

1 stop6h 24m

Lambert-St Louis

Sun 6/28

8:14 pm-12:20 am

1 stop4h 06m

$304

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 7/13

8:08 pm-7:23 pm

1 stop23h 15m

Lambert-St Louis

Thu 7/16

8:08 pm-7:23 pm

1 stop23h 15m

$323

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Sat 8/29

7:47 am-12:03 pm

1 stop4h 16m

Lambert-St Louis

Tue 9/1

1:36 pm-8:07 pm

1 stop6h 31m

$341

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 6/26

8:14 pm-6:53 pm

1 stop22h 39m

Lambert-St Louis

Sun 7/5

8:08 pm-3:54 pm

1 stop19h 46m

$353

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 St. Louis from

How to get the cheapest flight ticket from Sioux Falls to St. Louis

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 Sioux Falls and St. Louis?

What is the cheapest month to fly to St. Louis?

In general, September is the cheapest month to fly from Sioux Falls to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $278. The month of August is another great option to travel to St. Louis, with average flight prices from Sioux Falls averaging around $288.

When to book flights from Sioux Falls to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Sioux Falls to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Sioux Falls to St. Louis (FSD to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sioux Falls to St. Louis

Fastest flight time

3h 46m

Direct flights

None
The fastest flight from Sioux Falls to St. Louis takes 3h 46m
There are no direct flights from Sioux Falls to St. Louis. There are no popular flight routes from Sioux Falls to St. Louis.
Search flight deals

Frequently asked questions about flying from Sioux Falls to St. Louis

  • How far is Sioux Falls Joe Foss Field to Lambert-St Louis by plane?

    The distance between Sioux Falls Joe Foss Field and Lambert-St Louis is about 480.2 mi. 3h 46m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Sioux Falls Joe Foss Field Airport to Lambert-St Louis Airport?

    Prices for flights from Sioux Falls Joe Foss Field Airport to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Sioux Falls Joe Foss Field Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Sioux Falls Joe Foss Field Airport to Lambert-St Louis Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sioux Falls Joe Foss Field Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Sioux Falls to St. Louis?

Best airlines flying from Sioux Falls to St. Louis

Compare and see reviews for airlines that fly from Sioux Falls to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $228Free CancellationRating
7.9
8,398 reviews
Search Delta flights
American AirlinesPriceFrom $243Free CancellationRating
7.1
11,642 reviews
Search American Airlines flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
9,771 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Fenton
Alton
Wentzville
Farmington
Festus
Eureka
Clayton
Litchfield
Edwardsville
Shrewsbury
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Sioux Falls to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Sioux Falls to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Sioux Falls to St. Louis with flexible booking policies on momondo?

Flights from Sioux Falls to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Sioux Falls to St. Louis?

momondo helps you find the best flight between Sioux Falls and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Sioux Falls to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Sioux Falls to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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