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Cheap flights from Sioux Falls to St. Louis from $126

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 12/10. 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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0 bags

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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.
Delta Logo
5:18 am - 8:55 amFSD-STL
3h 37m1 stop
Delta Logo
5:34 pm - 11:00 pmSTL-FSD
5h 26m1 stop
$244Delta
Find Deal
Thu, Nov 20 - Mon, Nov 24
Delta Logo
8:10 am - 2:58 pmFSD-STL
6h 48m1 stop
Delta Logo
6:10 am - 12:22 pmSTL-FSD
6h 12m1 stop
$278Delta
Find Deal
Tue, Mar 3 - Sat, Mar 7
American Airlines Logo
7:16 pm - 12:02 amFSD-STL
4h 46m1 stop
American Airlines Logo
1:20 pm - 9:09 pmSTL-FSD
7h 49m1 stop
$299American Airlines
Find Deal
Fri, Nov 21 - Tue, Nov 25
Multiple Airlines Logo
11:46 am - 11:16 amFSD-STL
23h 30m1 stop
Multiple Airlines Logo
7:04 pm - 9:15 amSTL-FSD
38h 11m2 stops
$324Multiple Airlines
Find Deal
Thu, Nov 20 - Mon, Nov 24
Multiple Airlines Logo
10:12 am - 6:36 pmFSD-STL
8h 24m2 stops
Multiple Airlines Logo
1:16 pm - 11:05 amSTL-FSD
21h 49m1 stop
$330Multiple Airlines
Find Deal
Mon, Dec 8 - Thu, Dec 11
United Airlines Logo
8:00 am - 2:25 pmFSD-STL
6h 25m1 stop
United Airlines Logo
5:27 pm - 2:40 pmSTL-FSD
21h 13m1 stop
$344United Airlines
Find Deal
Wed, Dec 3 - Fri, Dec 5
American Airlines Logo
7:16 pm - 11:56 pmFSD-STL
4h 40m1 stop
American Airlines Logo
7:35 pm - 11:06 amSTL-FSD
15h 31m1 stop
$348American Airlines
Find Deal
Tue, Dec 2 - Fri, Dec 5
Frontier Logo
8:26 pm - 10:02 amFSD-STL
13h 36m1 stop
Frontier Logo
3:14 pm - 7:31 pmSTL-FSD
28h 17m2 stops
$359Frontier
Find Deal
Fri, Nov 21 - Tue, Nov 25
Multiple Airlines Logo
10:12 am - 6:36 pmFSD-STL
8h 24m2 stops
Multiple Airlines Logo
2:47 pm - 9:22 amSTL-FSD
18h 35m2 stops
$369Multiple Airlines
Find Deal
Mon, Dec 8 - Thu, Dec 11
United Airlines Logo
7:45 am - 12:20 pmFSD-STL
4h 35m1 stop
United Airlines Logo
5:18 pm - 9:47 pmSTL-FSD
4h 29m1 stop
$407United Airlines
Find Deal
Fri, May 1 - Sun, May 3

Delta flights from Sioux Falls to St. Louis

Our best Delta deals on Sioux Falls to St. Louis flight tickets
Delta
Nov 20
FSD5:18 amSioux Falls Joe Foss Field
3h 37m
1 stop
STL8:55 amLambert-St Louis
Nov 24
STL5:34 pmLambert-St Louis
5h 26m
1 stop
FSD11:00 pmSioux Falls Joe Foss Field
$244
Find similar
Delta
Mar 3
FSD8:10 amSioux Falls Joe Foss Field
6h 48m
1 stop
STL2:58 pmLambert-St Louis
Mar 7
STL6:10 amLambert-St Louis
6h 12m
1 stop
FSD12:22 pmSioux Falls Joe Foss Field
$278
Find similar
Delta
Mar 3
FSD1:02 pmSioux Falls Joe Foss Field
3h 45m
1 stop
STL4:47 pmLambert-St Louis
Mar 7
STL6:35 amLambert-St Louis
13h 08m
2 stops
FSD7:43 pmSioux Falls Joe Foss Field
$373
Find similar

American Airlines flights from Sioux Falls to St. Louis

Our best American Airlines deals on Sioux Falls to St. Louis flight tickets
American Airlines
Nov 15
FSD6:30 amSioux Falls Joe Foss Field
6h 07m
1 stop
STL12:37 pmLambert-St Louis
Nov 19
STL5:17 amLambert-St Louis
7h 06m
1 stop
FSD12:23 pmSioux Falls Joe Foss Field
$279
Find similar
American Airlines
Nov 21
FSD7:16 pmSioux Falls Joe Foss Field
4h 46m
1 stop
STL12:02 amLambert-St Louis
Nov 25
STL1:20 pmLambert-St Louis
7h 49m
1 stop
FSD9:09 pmSioux Falls Joe Foss Field
$299
Find similar
American Airlines
Dec 2
FSD7:16 pmSioux Falls Joe Foss Field
4h 40m
1 stop
STL11:56 pmLambert-St Louis
Dec 5
STL7:35 pmLambert-St Louis
15h 31m
1 stop
FSD11:06 amSioux Falls Joe Foss Field
$348
Find similar

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 November 6, 2025.
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

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 11/20

5:18 am-8:55 am

1 stop3h 37m

Lambert-St Louis

Mon 11/24

5:34 pm-11:00 pm

1 stop5h 26m

$244

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Tue 3/3

8:10 am-2:58 pm

1 stop6h 48m

Lambert-St Louis

Sat 3/7

6:10 am-12:22 pm

1 stop6h 12m

$278

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 11/21

7:16 pm-12:02 am

1 stop4h 46m

Lambert-St Louis

Tue 11/25

1:20 pm-9:09 pm

1 stop7h 49m

$299

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 11/20

11:46 am-11:16 am

1 stop23h 30m

Lambert-St Louis

Mon 11/24

7:04 pm-9:15 am

2 stops38h 11m

$324

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 12/8

10:12 am-6:36 pm

2 stops8h 24m

Lambert-St Louis

Thu 12/11

1:16 pm-11:05 am

1 stop21h 49m

$330

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 12/3

8:00 am-2:25 pm

1 stop6h 25m

Lambert-St Louis

Fri 12/5

5:27 pm-2:40 pm

1 stop21h 13m

$344

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Tue 12/2

7:16 pm-11:56 pm

1 stop4h 40m

Lambert-St Louis

Fri 12/5

7:35 pm-11:06 am

1 stop15h 31m

$348

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 11/21

8:26 pm-10:02 am

1 stop13h 36m

Lambert-St Louis

Tue 11/25

3:14 pm-7:31 pm

2 stops28h 17m

$359

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 12/8

10:12 am-6:36 pm

2 stops8h 24m

Lambert-St Louis

Thu 12/11

2:47 pm-9:22 am

2 stops18h 35m

$369

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Fri 5/1

7:45 am-12:20 pm

1 stop4h 35m

Lambert-St Louis

Sun 5/3

5:18 pm-9:47 pm

1 stop4h 29m

$407

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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, August 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 $288. The month of April is another great option to travel to St. Louis, with average flight prices from Sioux Falls averaging around $289.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $253. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $440. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Sioux Falls in the evening is the least expensive time of day to depart. momondo users have found prices as low as $228 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $397 per ticket.

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

Direct flights

None
There are no direct flights from Sioux Falls to St. Louis. There are no popular flight routes from Sioux Falls to St. Louis.
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  • 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 37m 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
8,001 reviews
Search Delta flights
United AirlinesPriceFrom $241Free CancellationRating
7.4
9,007 reviews
Search United Airlines flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
11,040 reviews
Search American 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
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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