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$146+ Cheap flights from Louisville to St. Louis (SDF - 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Louisville to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 18, 2025.

Round-trip from

$211
(American Airlines)

One-way from

$146
(Kiwi.com)

Popular in

October

Cheapest in

August

Average price

$204
From Louisville Intl to Lambert-St Louis
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One-way flight from Louisville Intl to Lambert-St Louis
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Highest demand for flights based on searches. 10% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Louisville to St. Louis

Cheapest flights from Louisville to St. Louis
Explore the most affordable flight options available from Louisville to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This American Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:13 pmSDF - STL
1 stop4h 54mAmerican Airlines
Wed 11/191:43 pmSTL - SDF
1 stop8h 16mAmerican Airlines
Deal found 8/16$211
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:00 amSDF - STL
1 stop7h 23mAmerican Airlines
Wed 9/106:29 amSTL - SDF
1 stop4h 59mAmerican Airlines
Deal found 8/18$229
This American Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:00 amSDF - STL
1 stop9h 24mAmerican Airlines
Mon 9/222:11 pmSTL - SDF
1 stop6h 25mAmerican Airlines
Deal found 8/18$238
This Southwest deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:45 amSDF - STL
2 stops8h 05mSouthwest
Wed 11/197:00 amSTL - SDF
1 stop4h 25mSouthwest
Deal found 8/16$249
This FlightHub deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:58 pmSDF - STL
1 stop23h 47mSpirit Airlines
Sun 10/2610:57 amSTL - SDF
1 stop6h 06mSpirit Airlines
Deal found 8/17$286
This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:45 pmSDF - STL
1 stop4h 04mDelta
Tue 12/26:45 amSTL - SDF
1 stop5h 54mDelta
Deal found 8/17$287
This Delta deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/265:53 pmSDF - STL
1 stop6h 31mDelta
Mon 9/295:11 pmSTL - SDF
1 stop4h 35mDelta
Deal found 8/16$294
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:20 pmSDF - STL
2 stops17h 46mMultiple Airlines
Mon 9/291:57 pmSTL - SDF
1 stop18h 22mMultiple Airlines
Deal found 8/16$302
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:49 amSDF - STL
1 stop10h 21mMultiple Airlines
Sun 10/2610:17 amSTL - SDF
2 stops30h 46mMultiple Airlines
Deal found 8/17$310

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville 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, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
Use the filters below to find and compare flights from Louisville to St. Louis that are best for you.

Fly from

Louisville

Fly to

St. Louis

Route

Depart

Return

Price

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 11/17

7:13 pm-11:07 pm

1 stop4h 54m

Lambert-St Louis

Wed 11/19

1:43 pm-10:59 pm

1 stop8h 16m

$211

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/9

7:00 am-1:23 pm

1 stop7h 23m

Lambert-St Louis

Wed 9/10

6:29 am-12:28 pm

1 stop4h 59m

$229

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 9/20

7:00 am-3:24 pm

1 stop9h 24m

Lambert-St Louis

Mon 9/22

2:11 pm-9:36 pm

1 stop6h 25m

$238

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 11/17

6:45 am-1:50 pm

2 stops8h 05m

Lambert-St Louis

Wed 11/19

7:00 am-12:25 pm

1 stop4h 25m

$249

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 10/24

6:58 pm-5:45 pm

1 stop23h 47m

Lambert-St Louis

Sun 10/26

10:57 am-6:03 pm

1 stop6h 06m

$286

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 12/1

5:45 pm-8:49 pm

1 stop4h 04m

Lambert-St Louis

Tue 12/2

6:45 am-1:39 pm

1 stop5h 54m

$287

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 9/26

5:53 pm-11:24 pm

1 stop6h 31m

Lambert-St Louis

Mon 9/29

5:11 pm-10:46 pm

1 stop4h 35m

$294

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 9/26

4:20 pm-9:06 am

2 stops17h 46m

Lambert-St Louis

Mon 9/29

1:57 pm-9:19 am

1 stop18h 22m

$302

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 10/2

7:00 am-8:25 pm

1 stop14h 25m

Lambert-St Louis

Thu 10/9

7:16 am-11:03 pm

1 stop14h 47m

$302

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sun 9/21

8:23 am-3:04 pm

3 stops31h 41m

$146

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 17 results
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Best time to book a flight from Louisville to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Louisville 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 Louisville to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Louisville to St. Louis (average of $311). Flying from Louisville 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 SDF to STL?

Find hourly flight availability from Louisville 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 August 18, 2025.

One of the essential ways to save on airfare from Louisville to St. Louis is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 12% on airfare.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated August 18, 2025.
Read through reviews of airlines operating flights from Louisville to St. Louis, such as Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

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
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

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

Find useful and relevant information for your journey from Louisville to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Louisville to St. Louis?

    American Airlines and Southwest can get you from Louisville to St. Louis in just under 4h 54m. Your travel time can differ by up to 3h 11m. There are 254 mi between Louisville and St. Louis. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Louisville to St. Louis round-trip?

    According to our current data, Delta ($204), offers the cheapest pricing from Louisville to St. Louis. Delta is 41% cheaper than the average price of flights available within the next 90 days to this destination.

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

    Yes. In addition to deals on Louisville to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to St. Louis.

  • Can I find deals for business class flights from Louisville to St. Louis?

    Yes. Cheapflights offers flight deals from Louisville 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 Louisville to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Louisville to St. Louis (average of $311). Flying from Louisville 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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Top airline flying from Louisville to St. Louis

Discover the top airline that operate flights from Louisville to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$374FlexibilityNo cancel feeOn-timeN/A

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