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$125+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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Cheap 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 July 28, 2026.

This Southwest deal was found by Cheapflights users on 7/27. 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.
Wed 8/2612:50 pm
SDF
-
STL
1 stop5h 00m
Southwest
Thu 8/2712:55 pm
STL
-
SDF
1 stop8h 00m
Southwest
Deal found 7/27$261
This Southwest deal was found by Cheapflights users on 7/24. 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.
Sat 8/158:20 am
SDF
-
STL
2 stops6h 05m
Southwest
Mon 8/173:45 pm
STL
-
SDF
1 stop3h 45m
Southwest
Deal found 7/24$295
This Southwest deal was found by Cheapflights users on 7/27. 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.
Fri 8/217:10 pm
SDF
-
STL
1 stop3h 55m
Southwest
Sat 8/221:20 pm
STL
-
SDF
1 stop6h 45m
Southwest
Deal found 7/27$307
This American Airlines deal was found by Cheapflights users on 7/23. 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.
Fri 8/216:30 pm
SDF
-
STL
1 stop14h 54m
American Airlines
Thu 8/279:32 am
STL
-
SDF
1 stop7h 28m
American Airlines
Deal found 7/23$313
This Southwest deal was found by Cheapflights users on 7/24. 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.
Thu 8/271:45 pm
SDF
-
STL
1 stop5h 20m
Southwest
Sun 8/303:30 pm
STL
-
SDF
1 stop3h 40m
Southwest
Deal found 7/24$328
This United Airlines deal was found by Cheapflights users on 7/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:00 am
SDF
-
STL
1 stop6h 13m
United Airlines
Wed 10/71:29 pm
STL
-
SDF
1 stop6h 02m
United Airlines
Deal found 7/27$331
This Southwest deal was found by Cheapflights users on 7/27. 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.
Thu 9/106:00 pm
SDF
-
STL
1 stop5h 30m
Southwest
Thu 9/174:15 pm
STL
-
SDF
1 stop5h 25m
Southwest
Deal found 7/27$339

Find 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 July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$261
(United Airlines)

One-way from

$125
(Kiwi.com)
Provider with most accurate pricing for Louisville Intl-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Lambert-St Louis flights.
Search Deals
From Louisville Intl to Lambert-St Louis
Search Deals
One-way flight from Louisville Intl to Lambert-St Louis
Search Deals

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 July 28, 2026.
Use the filters below to find and compare flights from Louisville to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 8/20

5:15 am-8:39 am

1 stop4h 24m

Lambert-St Louis

Thu 8/27

12:59 pm-7:07 pm

1 stop5h 08m

$261

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 8/26

12:50 pm-4:50 pm

1 stop5h 00m

Lambert-St Louis

Thu 8/27

12:55 pm-9:55 pm

1 stop8h 00m

$261
Quickest round-trip

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 9/9

10:29 am-1:16 pm

1 stop3h 47m

Lambert-St Louis

Wed 9/16

5:00 am-9:43 am

1 stop3h 43m

$261

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 8/15

9:55 am-7:45 pm

1 stop10h 50m

Lambert-St Louis

Mon 8/17

8:00 am-1:05 pm

1 stop4h 05m

$266

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 8/20

1:45 pm-8:10 pm

2 stops7h 25m

Lambert-St Louis

Thu 8/27

12:55 pm-9:55 pm

1 stop8h 00m

$266

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 8/21

7:55 am-11:50 am

1 stop4h 55m

Lambert-St Louis

Sat 8/22

1:15 pm-9:05 pm

2 stops6h 50m

$312

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 9/9

10:50 am-5:55 pm

2 stops8h 05m

Lambert-St Louis

Wed 9/16

6:30 am-11:20 am

1 stop3h 50m

$312

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 8/21

6:30 pm-8:24 am

1 stop14h 54m

Lambert-St Louis

Thu 8/27

9:32 am-6:00 pm

1 stop7h 28m

$313
Cheapest one-way

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 10/22

7:00 am-12:13 pm

1 stop6h 13m

$131

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 8/24

2:15 pm-7:05 pm

1 stop5h 50m

$131

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 18 resultsSorted by cheapest first
1
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Compare providers for flights from Louisville to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to St. Louis in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Louisville-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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?

    Southwest and American Airlines can get you from Louisville to St. Louis in just under 3h 47m. Your travel time can differ by up to 1h 13m. 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.

  • 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

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