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Cheap flights from Sioux Falls to St. Louis from $169

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 8/23. 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
8:52 pm - 7:17 pm
FSD
-
STL
22h 25m
1 stop
Frontier Logo
8:10 pm - 8:07 pm
STL
-
FSD
23h 57m
1 stop
$202Frontier
Fri, Sep 11 - Sun, Sep 20
American Airlines Logo
5:59 pm - 11:43 pm
FSD
-
STL
5h 44m
1 stop
American Airlines Logo
7:00 am - 12:16 pm
STL
-
FSD
5h 16m
1 stop
$290American Airlines
Wed, Sep 9 - Sun, Sep 13
Delta Logo
10:40 am - 4:47 pm
FSD
-
STL
6h 07m
1 stop
Delta Logo
3:52 pm - 7:43 pm
STL
-
FSD
3h 51m
1 stop
$290Delta
Sat, Sep 19 - Mon, Sep 21
Delta Logo
10:40 am - 4:47 pm
FSD
-
STL
6h 07m
1 stop
Delta Logo
6:15 am - 10:19 am
STL
-
FSD
4h 04m
1 stop
$290Delta
Wed, Sep 9 - Sun, Sep 13
American Airlines Logo
6:41 pm - 12:27 am
FSD
-
STL
5h 46m
1 stop
American Airlines Logo
7:00 am - 12:16 pm
STL
-
FSD
5h 16m
1 stop
$290American Airlines
Sat, Sep 19 - Mon, Sep 21
American Airlines Logo
12:56 pm - 12:27 am
FSD
-
STL
11h 31m
2 stops
American Airlines Logo
7:00 am - 12:16 pm
STL
-
FSD
5h 16m
1 stop
$295American Airlines
Wed, Sep 9 - Sun, Sep 13
Frontier Logo
8:52 pm - 9:35 am
FSD
-
STL
36h 43m
2 stops
Frontier Logo
8:10 pm - 6:36 pm
STL
-
FSD
22h 26m
1 stop
$308Frontier
Fri, Sep 11 - Sun, Sep 20
United Airlines Logo
6:31 pm - 10:59 pm
FSD
-
STL
4h 28m
1 stop
United Airlines Logo
1:36 pm - 8:20 pm
STL
-
FSD
6h 44m
1 stop
$351United Airlines
Sat, Sep 26 - Wed, Sep 30
Frontier Logo
7:31 pm - 9:40 am
FSD
-
STL
14h 09m
2 stops
Frontier Logo
8:10 pm - 6:36 pm
STL
-
FSD
22h 26m
1 stop
$391Frontier
Fri, Oct 23 - Sun, Oct 25
United Airlines Logo
9:35 am - 12:03 pm
FSD
-
STL
26h 28m
2 stops
United Airlines Logo
6:55 pm - 11:44 pm
STL
-
FSD
4h 49m
1 stop
$510United Airlines
Fri, Sep 18 - Sun, Sep 20

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Frontier flights from Sioux Falls to St. Louis

Our best Frontier deals on Sioux Falls to St. Louis flight tickets
Frontier
Sep 11
FSD8:52 pmSioux Falls Joe Foss Field
22h 25m
1 stop
STL7:17 pmLambert-St Louis
Sep 20
STL8:10 pmLambert-St Louis
23h 57m
1 stop
FSD8:07 pmSioux Falls Joe Foss Field
$202
Frontier
Sep 11
FSD8:52 pmSioux Falls Joe Foss Field
36h 43m
2 stops
STL9:35 amLambert-St Louis
Sep 20
STL8:10 pmLambert-St Louis
22h 26m
1 stop
FSD6:36 pmSioux Falls Joe Foss Field
$308
Frontier
Oct 23
FSD7:31 pmSioux Falls Joe Foss Field
14h 09m
2 stops
STL9:40 amLambert-St Louis
Oct 25
STL8:10 pmLambert-St Louis
22h 26m
1 stop
FSD6:36 pmSioux Falls Joe Foss Field
$391

American Airlines flights from Sioux Falls to St. Louis

Our best American Airlines deals on Sioux Falls to St. Louis flight tickets
American Airlines
Sep 9
FSD12:56 pmSioux Falls Joe Foss Field
11h 31m
2 stops
STL12:27 amLambert-St Louis
Sep 13
STL7:00 amLambert-St Louis
5h 16m
1 stop
FSD12:16 pmSioux Falls Joe Foss Field
$295
American Airlines
Aug 20
FSD6:06 pmSioux Falls Joe Foss Field
5h 36m
1 stop
STL11:42 pmLambert-St Louis
Aug 23
STL5:42 amLambert-St Louis
6h 35m
1 stop
FSD12:17 pmSioux Falls Joe Foss Field
$299
American Airlines
Sep 19
FSD6:41 pmSioux Falls Joe Foss Field
5h 46m
1 stop
STL12:27 amLambert-St Louis
Sep 21
STL7:00 amLambert-St Louis
5h 16m
1 stop
FSD12:16 pmSioux Falls Joe Foss Field
$300

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 August 2, 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

Fri 9/11

8:52 pm-7:17 pm

1 stop22h 25m

Lambert-St Louis

Sun 9/20

8:10 pm-8:07 pm

1 stop23h 57m

$202

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 9/9

5:59 pm-11:43 pm

1 stop5h 44m

Lambert-St Louis

Sun 9/13

7:00 am-12:16 pm

1 stop5h 16m

$290
Quickest round-trip

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Sat 9/19

10:40 am-4:47 pm

1 stop6h 07m

Lambert-St Louis

Mon 9/21

3:52 pm-7:43 pm

1 stop3h 51m

$290

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 9/9

10:40 am-4:47 pm

1 stop6h 07m

Lambert-St Louis

Sun 9/13

6:15 am-10:19 am

1 stop4h 04m

$290

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Sat 9/19

6:41 pm-12:27 am

1 stop5h 46m

Lambert-St Louis

Mon 9/21

7:00 am-12:16 pm

1 stop5h 16m

$290

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 9/9

12:56 pm-12:27 am

2 stops11h 31m

Lambert-St Louis

Sun 9/13

7:00 am-12:16 pm

1 stop5h 16m

$295

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 9/11

8:52 pm-9:35 am

2 stops36h 43m

Lambert-St Louis

Sun 9/20

8:10 pm-6:36 pm

1 stop22h 26m

$308

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Sat 9/26

6:31 pm-10:59 pm

1 stop4h 28m

Lambert-St Louis

Wed 9/30

1:36 pm-8:20 pm

1 stop6h 44m

$351

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 10/23

7:31 pm-9:40 am

2 stops14h 09m

Lambert-St Louis

Sun 10/25

8:10 pm-6:36 pm

1 stop22h 26m

$391

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 9/18

9:35 am-12:03 pm

2 stops26h 28m

Lambert-St Louis

Sun 9/20

6:55 pm-11:44 pm

1 stop4h 49m

$510

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 cheapest month to fly to St. Louis?

In general, December 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 $302. The month of April is another great option to travel to St. Louis, with average flight prices from Sioux Falls averaging around $372.

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

4h 10m

Direct flights

None
The fastest flight from Sioux Falls to St. Louis takes 4h 10m
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. 4h 10m 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
11,846 reviews
Search American Airlines flights
DeltaPriceFrom $249Free CancellationRating
7.8
8,493 reviews
Search Delta flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
10,061 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
St. Peters
Maryland Heights
Florissant
Collinsville
Alton
O'Fallon
Clayton
Farmington
Fenton
Wentzville
Festus
Eureka
Edwardsville
Litchfield
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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