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Cheap flights from Sioux Falls to St. Louis from $173

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 10/26. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
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
$242Frontier
Wed, Jul 15 - Sun, Jul 19
United Airlines Logo
6:51 pm - 11:57 pm
FSD
-
STL
5h 06m
1 stop
United Airlines Logo
5:10 am - 10:23 am
STL
-
FSD
5h 13m
1 stop
$271United Airlines
Wed, Jul 29 - Wed, Aug 5
United Airlines Logo
5:05 pm - 11:57 pm
FSD
-
STL
6h 52m
1 stop
United Airlines Logo
5:10 am - 10:23 am
STL
-
FSD
5h 13m
1 stop
$280United Airlines
Wed, Jul 29 - Wed, Aug 5
American Airlines Logo
5:55 pm - 11:43 pm
FSD
-
STL
5h 48m
1 stop
American Airlines Logo
11:01 am - 8:45 pm
STL
-
FSD
9h 44m
2 stops
$285American Airlines
Thu, Oct 1 - Sat, Oct 3
American Airlines Logo
5:23 pm - 12:14 am
FSD
-
STL
6h 51m
1 stop
American Airlines Logo
5:42 am - 12:17 pm
STL
-
FSD
6h 35m
1 stop
$289American Airlines
Thu, Aug 13 - Mon, Aug 17
United Airlines Logo
6:51 pm - 11:57 pm
FSD
-
STL
5h 06m
1 stop
United Airlines Logo
5:59 pm - 11:31 pm
STL
-
FSD
5h 32m
1 stop
$304United Airlines
Fri, Jul 17 - Sat, Jul 25
American Airlines Logo
1:09 pm - 11:58 pm
FSD
-
STL
10h 49m
2 stops
American Airlines Logo
5:00 am - 11:41 am
STL
-
FSD
6h 41m
1 stop
$329American Airlines
Thu, Dec 3 - Sun, Dec 6
American Airlines Logo
12:57 pm - 12:14 am
FSD
-
STL
11h 17m
2 stops
American Airlines Logo
5:42 am - 12:17 pm
STL
-
FSD
6h 35m
1 stop
$330American Airlines
Tue, Aug 18 - Sun, Aug 23
United Airlines Logo
6:39 pm - 10:59 pm
FSD
-
STL
4h 20m
1 stop
United Airlines Logo
9:00 am - 4:23 pm
STL
-
FSD
7h 23m
1 stop
$341United Airlines
Wed, Aug 26 - Sat, Aug 29
Multiple Airlines Logo
8:08 pm - 7:23 pm
FSD
-
STL
23h 15m
1 stop
Multiple Airlines Logo
8:08 pm - 8:03 pm
STL
-
FSD
23h 55m
2 stops
$388Multiple Airlines
Fri, Jul 24 - Tue, Jul 28

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Delta flights from Sioux Falls to St. Louis

Our best Delta deals on Sioux Falls to St. Louis flight tickets
Delta
Jul 10
FSD5:00 amSioux Falls Joe Foss Field
5h 28m
1 stop
STL10:28 amLambert-St Louis
Jul 12
STL6:21 amLambert-St Louis
6h 28m
1 stop
FSD12:49 pmSioux Falls Joe Foss Field
$359
Delta
Jul 29
FSD1:30 pmSioux Falls Joe Foss Field
10h 23m
2 stops
STL11:53 pmLambert-St Louis
Aug 5
STL5:34 pmLambert-St Louis
5h 17m
1 stop
FSD10:51 pmSioux Falls Joe Foss Field
$430
Delta
Jul 29
FSD1:30 pmSioux Falls Joe Foss Field
10h 23m
2 stops
STL11:53 pmLambert-St Louis
Aug 5
STL5:34 pmLambert-St Louis
5h 17m
1 stop
FSD10:51 pmSioux Falls Joe Foss Field
$435

American Airlines flights from Sioux Falls to St. Louis

Our best American Airlines deals on Sioux Falls to St. Louis flight tickets
American Airlines
Oct 1
FSD5:55 pmSioux Falls Joe Foss Field
5h 48m
1 stop
STL11:43 pmLambert-St Louis
Oct 3
STL11:01 amLambert-St Louis
9h 44m
2 stops
FSD8:45 pmSioux Falls Joe Foss Field
$285
American Airlines
Aug 13
FSD5:23 pmSioux Falls Joe Foss Field
6h 51m
1 stop
STL12:14 amLambert-St Louis
Aug 17
STL5:42 amLambert-St Louis
6h 35m
1 stop
FSD12:17 pmSioux Falls Joe Foss Field
$289
American Airlines
Dec 3
FSD1:09 pmSioux Falls Joe Foss Field
10h 49m
2 stops
STL11:58 pmLambert-St Louis
Dec 6
STL5:00 amLambert-St Louis
6h 41m
1 stop
FSD11:41 amSioux Falls Joe Foss Field
$329

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 July 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

Wed 7/15

8:08 pm-7:23 pm

1 stop23h 15m

Lambert-St Louis

Sun 7/19

8:08 pm-7:23 pm

1 stop23h 15m

$242
Quickest round-trip

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 7/29

6:51 pm-11:57 pm

1 stop5h 06m

Lambert-St Louis

Wed 8/5

5:10 am-10:23 am

1 stop5h 13m

$271

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 7/29

5:05 pm-11:57 pm

1 stop6h 52m

Lambert-St Louis

Wed 8/5

5:10 am-10:23 am

1 stop5h 13m

$280

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 10/1

5:55 pm-11:43 pm

1 stop5h 48m

Lambert-St Louis

Sat 10/3

11:01 am-8:45 pm

2 stops9h 44m

$285

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 8/13

5:23 pm-12:14 am

1 stop6h 51m

Lambert-St Louis

Mon 8/17

5:42 am-12:17 pm

1 stop6h 35m

$289

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 7/17

6:51 pm-11:57 pm

1 stop5h 06m

Lambert-St Louis

Sat 7/25

5:59 pm-11:31 pm

1 stop5h 32m

$304

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 12/3

1:09 pm-11:58 pm

2 stops10h 49m

Lambert-St Louis

Sun 12/6

5:00 am-11:41 am

1 stop6h 41m

$329

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Tue 8/18

12:57 pm-12:14 am

2 stops11h 17m

Lambert-St Louis

Sun 8/23

5:42 am-12:17 pm

1 stop6h 35m

$330

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 8/26

6:39 pm-10:59 pm

1 stop4h 20m

Lambert-St Louis

Sat 8/29

9:00 am-4:23 pm

1 stop7h 23m

$341

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 7/24

8:08 pm-7:23 pm

1 stop23h 15m

Lambert-St Louis

Tue 7/28

8:08 pm-8:03 pm

2 stops23h 55m

$388

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 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 July 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 33m

Direct flights

None
The fastest flight from Sioux Falls to St. Louis takes 3h 33m
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 33m 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
American AirlinesPriceFrom $243Free CancellationRating
7.1
11,764 reviews
Search American Airlines flights
DeltaPriceFrom $249Free CancellationRating
7.8
8,453 reviews
Search Delta flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
9,927 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
Alton
Fenton
Farmington
Wentzville
Clayton
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

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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