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$133+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Apr 8 — Apr 151
Wed 4/8
Wed 4/15
1 adult, Economy
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Find cheap flights from Louisville to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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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 March 9, 2026.

This American Airlines deal was found by Cheapflights users on 3/5. 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 4/207:01 pm
SDF
-
STL
1 stop5h 45m
American Airlines
Wed 4/227:05 am
STL
-
SDF
1 stop8h 00m
American Airlines
Deal found 3/5$263
This Southwest deal was found by Cheapflights users on 3/6. 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 4/186:40 am
SDF
-
STL
1 stop2h 45m
Southwest
Mon 4/205:40 am
STL
-
SDF
1 stop3h 15m
Southwest
Deal found 3/6$304
This Delta deal was found by Cheapflights users on 3/7. 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.
Sat 4/186:08 pm
SDF
-
STL
1 stop3h 36m
Delta
Mon 4/206:48 am
STL
-
SDF
1 stop6h 42m
Delta
Deal found 3/7$309
This Southwest deal was found by Cheapflights users on 3/5. 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 4/204:45 pm
SDF
-
STL
2 stops7h 00m
Southwest
Wed 4/221:45 pm
STL
-
SDF
1 stop5h 50m
Southwest
Deal found 3/5$314
This American Airlines deal was found by Cheapflights users on 3/5. 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 4/247:01 pm
SDF
-
STL
1 stop5h 45m
American Airlines
Mon 4/278:03 pm
STL
-
SDF
1 stop13h 43m
American Airlines
Deal found 3/5$316
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Fri 4/245:48 pm
SDF
-
STL
1 stop5h 04m
United Airlines
Sat 4/259:16 am
STL
-
SDF
1 stop6h 25m
United Airlines
Deal found 3/6$325
This Southwest deal was found by Cheapflights users on 3/7. 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 4/175:25 pm
SDF
-
STL
1 stop4h 30m
Southwest
Sat 4/1810:55 am
STL
-
SDF
2 stops5h 50m
Southwest
Deal found 3/7$330
This American Airlines deal was found by Cheapflights users on 3/6. 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.
Wed 5/278:05 pm
SDF
-
STL
1 stop4h 39m
American Airlines
Mon 6/16:12 pm
STL
-
SDF
1 stop5h 15m
American Airlines
Deal found 3/6$339
This Southwest deal was found by Cheapflights users on 3/8. 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 4/68:10 pm
SDF
-
STL
1 stop4h 20m
Southwest
Mon 4/134:00 pm
STL
-
SDF
1 stop6h 45m
Southwest
Deal found 3/8$343

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 March 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$263
(American Airlines)

One-way from

$133
(Southwest)

Popular in

May

Cheapest in

August

Average price

$342
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
Highest demand for flights based on searches. 6% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 9, 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

Sat 4/18

6:40 am-8:25 am

1 stop2h 45m

Lambert-St Louis

Mon 4/20

12:25 pm-9:45 pm

2 stops8h 20m

$310

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 4/18

10:46 am-4:42 pm

1 stop6h 56m

Lambert-St Louis

Mon 4/20

6:48 am-2:30 pm

1 stop6h 42m

$310

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 4/20

4:45 pm-10:45 pm

2 stops7h 00m

Lambert-St Louis

Wed 4/22

1:45 pm-8:35 pm

1 stop5h 50m

$314

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 4/24

7:01 pm-11:46 pm

1 stop5h 45m

Lambert-St Louis

Sat 4/25

5:21 pm-11:48 pm

1 stop5h 27m

$325

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sun 4/26

4:40 pm-11:25 pm

1 stop7h 45m

Lambert-St Louis

Sat 5/2

6:10 am-4:55 pm

2 stops9h 45m

$330

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 4/24

4:45 pm-10:45 pm

2 stops7h 00m

Lambert-St Louis

Sat 4/25

8:45 am-4:15 pm

2 stops6h 30m

$335

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 4/17

2:40 pm-8:55 pm

2 stops7h 15m

Lambert-St Louis

Sat 4/18

8:45 am-4:15 pm

2 stops6h 30m

$335

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 4/6

8:10 pm-11:30 pm

1 stop4h 20m

Lambert-St Louis

Mon 4/13

4:00 pm-11:45 pm

1 stop6h 45m

$343
Quickest round-trip

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 4/24

4:45 pm-10:45 pm

2 stops7h 00m

Lambert-St Louis

Mon 4/27

7:35 am-11:40 am

1 stop3h 05m

$364
Cheapest one-way
Quickest one-way

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 5/9

6:40 am-8:25 am

1 stop2h 45m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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 March.
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.

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, October is the cheapest month in which you can book a flight from Louisville to St. Louis (average of $85). Flying from Louisville to St. Louis in January is currently the most expensive (average of $292). 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.

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 Delta can get you from Louisville to St. Louis in just under 2h 45m. Your travel time can differ by up to 4h 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.

  • 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, October is the cheapest month in which you can book a flight from Louisville to St. Louis (average of $85). Flying from Louisville to St. Louis in January is currently the most expensive (average of $292). 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
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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