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$138+ Cheap flights from St. Louis to Louisville (STL - SDF)

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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SDF
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
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Cheap flight deals from St. Louis to Louisville

Cheapest flights from St. Louis to Louisville
Explore the most affordable flight options available from St. Louis to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.

This Southwest deal was found by Cheapflights users on 4/21. 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 5/206:35 am
STL
-
SDF
1 stop5h 05m
Southwest
Wed 5/278:55 am
SDF
-
STL
1 stop3h 35m
Southwest
Deal found 4/21$251
This Delta deal was found by Cheapflights users on 4/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am
STL
-
SDF
1 stop4h 33m
Delta
Mon 9/287:30 pm
SDF
-
STL
1 stop5h 07m
Delta
Deal found 4/23$256
This Southwest deal was found by Cheapflights users on 4/19. 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.
Tue 5/127:35 am
STL
-
SDF
1 stop6h 10m
Southwest
Sat 5/166:40 am
SDF
-
STL
1 stop2h 45m
Southwest
Deal found 4/19$270
This American Airlines deal was found by Cheapflights users on 4/21. 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 5/125:51 am
STL
-
SDF
1 stop3h 55m
American Airlines
Sat 5/165:56 am
SDF
-
STL
1 stop6h 51m
American Airlines
Deal found 4/21$272
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/308:20 am
STL
-
SDF
1 stop7h 50m
Southwest
Wed 9/26:45 pm
SDF
-
STL
1 stop3h 55m
Southwest
Deal found 4/23$314
This Delta deal was found by Cheapflights users on 4/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/39:13 am
STL
-
SDF
1 stop6h 48m
Delta
Sun 6/75:23 pm
SDF
-
STL
1 stop4h 16m
Delta
Deal found 4/23$324

Find flight deals from St. Louis to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Louisville (SDF). 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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$251
(Southwest)

One-way from

$138
(United Airlines)

Popular in

June

Cheapest in

May

Average price

$508
Provider with most accurate pricing for Lambert-St Louis-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Louisville Intl flights.
Search Deals
From Lambert-St Louis to Louisville Intl
Search Deals
One-way flight from Lambert-St Louis to Louisville Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Louisville 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 April 24, 2026.
Use the filters below to find and compare flights from St. Louis to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Wed 5/20

6:35 am-12:40 pm

1 stop5h 05m

Louisville Intl

Wed 5/27

8:55 am-11:30 am

1 stop3h 35m

$251

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Tue 5/12

5:51 am-10:46 am

1 stop3h 55m

Louisville Intl

Sat 5/16

5:56 am-11:47 am

1 stop6h 51m

$272

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Tue 5/12

5:45 am-2:45 pm

2 stops8h 00m

Louisville Intl

Sat 5/16

6:40 am-8:25 am

1 stop2h 45m

$291

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sun 8/30

8:25 am-6:45 pm

2 stops9h 20m

Louisville Intl

Wed 9/2

8:45 am-4:45 pm

2 stops9h 00m

$325

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Wed 6/3

5:41 pm-11:59 pm

1 stop5h 18m

Louisville Intl

Thu 6/4

5:20 am-8:41 am

1 stop4h 21m

$326

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Thu 7/2

7:00 am-1:56 pm

1 stop5h 56m

Louisville Intl

Tue 7/7

5:04 am-8:32 am

1 stop4h 28m

$375
Cheapest one-way

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sat 5/16

7:45 am-3:09 pm

1 stop6h 24m

$138

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Tue 5/19

6:00 am-12:08 pm

1 stop5h 08m

$138

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sat 5/16

5:27 pm-9:28 am

2 stops15h 01m

$173
Quickest one-way

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sun 5/17

5:51 am-10:46 am

1 stop3h 55m

$208

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Louisville

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 St. Louis to Louisville in April.
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 St. Louis-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Louisville 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 St. Louis-Louisville 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 St. Louis to Louisville

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

How much does it cost to fly round-trip from St. Louis to Louisville?

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Louisville. 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 St. Louis to Louisville?

    Departing from St. Louis to Louisville will take you 3h 55m. The distance between St. Louis and Louisville is about 254 mi. 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 St. Louis to Louisville that include hotel bookings?

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

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

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

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

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

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Elizabethtown
Corydon
Jeffersonville
Bardstown

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