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 United Airlines. Our recent data shows that you can find tickets from as low as $239 on this airline. Additional options worth looking into are Delta and Frontier, starting at $244 and $276 round-trip. United Airlines is currently priced 28% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Sioux Falls to St. Louis one-way?

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $100. However, be on the lookout for offers from Frontier and American Airlines, as they are both options that can get you from Sioux Falls to St. Louis for a low price.

What is the cheapest day to fly from Sioux Falls to St. Louis?

Travelers seeking maximum savings on their Sioux Falls to St. Louis flight should consider departing on Thursday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from Sioux Falls to St. Louis?

American Airlines, Delta and United Airlines are the most popular airlines when flying from Sioux Falls to St. Louis.

What is the cheapest day to fly round-trip from Sioux Falls to St. Louis?

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 74% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from Sioux Falls to St. Louis?

The best pricing can be found in the month of August. Prices to St. Louis from Sioux Falls average $333. You can even find prices in August for less than $333, as users have found deals to St. Louis from as low as $228. The month of December appears to be one of the more expensive times to travel to St. Louis from Sioux Falls. Flying in the targeted month can save you up to 40%.

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.

$100+ Flights from Sioux Falls to St. Louis

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Cheap flight deals from Sioux Falls to St. Louis

Round-trip from	$239 (United Airlines)
One-way from	$100 (Delta)
Popular in	December
Cheapest in	August
Average price	$319

From Sioux Falls Joe Foss Field to Lambert-St Louis

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One-way flight from Sioux Falls Joe Foss Field to Lambert-St Louis

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Highest demand for flights based on searches. 14% potential increase in price ($56 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Find 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 juin 12, 2025.

mer. 11/197:30 pmFSD - STL

1 stop3h 32mDelta

dim. 11/236:30 amSTL - FSD

1 stop6h 01mDelta

Deal found 6/10

$229

ven. 6/276:49 pmFSD - STL

1 stop5h 10mUnited Airlines

mar. 7/15:15 amSTL - FSD

1 stop5h 27mUnited Airlines

Deal found 6/12

$239

dim. 8/172:57 pmFSD - STL

1 stop18h 14mFrontier

mer. 8/207:54 pmSTL - FSD

1 stop17h 29mFrontier

Deal found 6/12

$276

ven. 6/135:56 pmFSD - STL

1 stop5h 58mAmerican Airlines

sam. 6/148:05 pmSTL - FSD

1 stop3h 53mAmerican Airlines

Deal found 6/11

$289

mer. 7/23:16 pmFSD - STL

2 stops25h 48mMultiple Airlines

dim. 7/66:36 pmSTL - FSD

2 stops26h 13mMultiple Airlines

Deal found 6/12

$412

Best flights from Sioux Falls to St. Louis
Discover carefully curated flight deals from Sioux Falls to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated juin 12, 2025.

ven. 6/276:49 pmFSD - STL

1 stop5h 10mUnited Airlines

mar. 7/15:15 amSTL - FSD

1 stop5h 27mUnited Airlines

Deal found 6/12

$239

mar. 7/16:00 amFSD - STL

1 stop4h 33mDelta

dim. 7/66:30 amSTL - FSD

1 stop3h 44mDelta

Deal found 6/12

$244

dim. 8/172:57 pmFSD - STL

1 stop18h 14mFrontier

mer. 8/207:54 pmSTL - FSD

1 stop17h 29mFrontier

Deal found 6/12

$276

mar. 7/85:58 pmFSD - STL

1 stop5h 53mAmerican Airlines

lun. 7/147:23 amSTL - FSD

1 stop4h 40mAmerican Airlines

Deal found 6/9

$298

mer. 7/23:16 pmFSD - STL

2 stops25h 48mMultiple Airlines

dim. 7/66:36 pmSTL - FSD

2 stops26h 13mMultiple Airlines

Deal found 6/12

$412

Last-minute flights from Sioux Falls to St. Louis
Discover last-minute flight deals from Sioux Falls to St. Louis. Data last updated juin 12, 2025 and is based on user searches.

ven. 6/135:56 pmFSD - STL

1 stop5h 58mAmerican Airlines

sam. 6/148:05 pmSTL - FSD

1 stop3h 53mAmerican Airlines

Deal found 6/11

$289

ven. 6/137:27 pmFSD - STL

1 stop13h 45mFrontier

sam. 6/142:52 pmSTL - FSD

2 stops23h 10mFrontier

Deal found 6/11

$449

ven. 6/276:49 pmFSD - STL

1 stop5h 10mUnited Airlines

mar. 7/15:15 amSTL - FSD

1 stop5h 27mUnited Airlines

Deal found 6/12

$239

mar. 7/16:00 amFSD - STL

1 stop4h 33mDelta

dim. 7/66:30 amSTL - FSD

1 stop3h 44mDelta

Deal found 6/12

$244

mer. 7/23:16 pmFSD - STL

2 stops25h 48mMultiple Airlines

dim. 7/66:36 pmSTL - FSD

2 stops26h 13mMultiple Airlines

Deal found 6/12

$412

One-way flights from Sioux Falls to St. Louis
Search for one-way flight options from Sioux Falls to St. Louis. Find affordable one-way fares based on user searches. Data last updated juin 12, 2025.

mer. 7/27:59 pmFSD - STL

1 stop3h 28mDelta

Deal found 6/12

$100

mer. 7/23:16 pmFSD - STL

2 stops25h 48mMultiple Airlines

Deal found 6/12

$124

ven. 6/207:27 pmFSD - STL

1 stop13h 45mFrontier

Deal found 6/12

$167

mer. 7/26:20 amFSD - STL

1 stop5h 38mAmerican Airlines

Deal found 6/12

$220

Cheapflights Fare Finder

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

ven. 6/27

6:49 pm-11:59 pm

1 stop5h 10m

Lambert-St Louis

mar. 7/1

5:15 am-10:42 am

1 stop5h 27m

$239

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

mar. 7/1

6:00 am-10:33 am

1 stop4h 33m

Lambert-St Louis

dim. 7/6

6:30 am-10:14 am

1 stop3h 44m

$244

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

dim. 8/17

2:57 pm-9:11 am

1 stop18h 14m

Lambert-St Louis

mer. 8/20

7:54 pm-1:23 pm

1 stop17h 29m

$276

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

mar. 7/8

5:58 pm-11:51 pm

1 stop5h 53m

Lambert-St Louis

lun. 7/14

7:23 am-12:03 pm

1 stop4h 40m

$298

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

mer. 7/2

3:16 pm-5:04 pm

2 stops25h 48m

Lambert-St Louis

dim. 7/6

6:36 pm-8:49 pm

2 stops26h 13m

$412

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

mer. 7/2

7:59 pm-11:27 pm

1 stop3h 28m

$100

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

mer. 7/2

3:16 pm-5:04 pm

2 stops25h 48m

$124

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

ven. 6/20

7:27 pm-9:12 am

1 stop13h 45m

$167

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

mer. 7/2

6:20 am-11:58 am

1 stop5h 38m

$220

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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, August is the cheapest month in which you can book a flight from Sioux Falls to St. Louis (average of $311). Flying from Sioux Falls to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from FSD to STL?

It’s typically best to fly out from Sioux Falls to St. Louis in the evening. Doing so could potentially save you 43% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,946 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,790 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

6.0

Okay

3,295 reviews

Delta

8.0

Very good

7,946 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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 United Airlines. Our recent data shows that you can find tickets from as low as $239 on this airline. Additional options worth looking into are Delta and Frontier, starting at $244 and $276 round-trip. United Airlines is currently priced 28% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Sioux Falls to St. Louis one-way?
The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $100. However, be on the lookout for offers from Frontier and American Airlines, as they are both options that can get you from Sioux Falls to St. Louis for a low price.
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, August is the cheapest month in which you can book a flight from Sioux Falls to St. Louis (average of $311). Flying from Sioux Falls to St. Louis in March is currently the most expensive (average of $356). 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

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Eureka

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Top 3 airlines flying from Sioux Falls to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$228	Average$378	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$228	Average$293	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$238	Average$300	FlexibilityNo cancel fee	On-time71%

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$100+ Cheap flights from Sioux Falls to St. Louis (FSD - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Sioux Falls to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Sioux Falls to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Sioux Falls to St. Louis

Cheapest flights from Sioux Falls to St. LouisExplore 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 juin 12, 2025.

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 juin 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sioux Falls to St. Louis that are best for you.

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.

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?

What is the cheapest time of day to fly from FSD to STL?

Find hourly flight availability from Sioux Falls to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated juin 12, 2025.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

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.

What are the cheapest airlines flying from Sioux Falls to St. Louis round-trip?

What are the cheapest airlines to fly from Sioux Falls to St. Louis one-way?

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

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

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

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

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Alternative routes for Sioux Falls to St. Louis

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Top 3 airlines flying from Sioux Falls to St. Louis

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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 juin 12, 2025.