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$303+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SDF
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 December 12, 2025.

This Delta deal was found by Cheapflights users on 12/10. 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.
Thu 12/256:29 amSTL - SDF
1 stop5h 43mDelta
Mon 12/294:39 pmSDF - STL
1 stop6h 37mDelta
Deal found 12/10$399
This American Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/257:05 amSTL - SDF
1 stop7h 07mAmerican Airlines
Mon 12/295:00 amSDF - STL
2 stops9h 36mAmerican Airlines
Deal found 12/10$415
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/263:10 pmSTL - SDF
1 stop4h 22mUnited Airlines
Sun 12/289:05 amSDF - STL
1 stop6h 21mUnited Airlines
Deal found 12/11$499
This American Airlines deal was found by Cheapflights users on 12/11. 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 12/262:04 pmSTL - SDF
1 stop6h 41mAmerican Airlines
Sun 12/285:00 amSDF - STL
2 stops9h 36mAmerican Airlines
Deal found 12/11$504
This American Airlines deal was found by Cheapflights users on 12/11. 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 12/205:16 pmSTL - SDF
1 stop5h 14mAmerican Airlines
Mon 1/57:24 pmSDF - STL
1 stop5h 31mAmerican Airlines
Deal found 12/11$530
This Southwest deal was found by Cheapflights users on 12/10. 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 12/195:40 amSTL - SDF
1 stop5h 05mSouthwest
Sun 1/45:05 amSDF - STL
2 stops13h 25mSouthwest
Deal found 12/10$550
This American Airlines deal was found by Cheapflights users on 12/11. 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 12/232:04 pmSTL - SDF
1 stop7h 10mAmerican Airlines
Tue 12/305:00 amSDF - STL
1 stop4h 35mAmerican Airlines
Deal found 12/11$552

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$356
(United Airlines)

One-way from

$303
(United Airlines)

Popular in

July

Cheapest in

April

Average price

$544
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. 12% potential increase in price ($67 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 December 2025
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 December 12, 2025.
Use the filters below to find and compare flights from St. Louis to Louisville that are best for you.

Fly from

St. Louis

Fly to

Louisville

Route

Depart

Return

Price

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sun 1/18

3:11 pm-8:28 pm

1 stop4h 17m

Louisville Intl

Thu 1/22

2:05 pm-5:43 pm

1 stop4h 38m

$356

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Fri 4/17

1:30 pm-7:01 pm

1 stop4h 31m

Louisville Intl

Sun 4/19

7:00 am-10:45 am

1 stop4h 45m

$357

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Fri 1/2

11:05 am-5:28 pm

1 stop5h 23m

Louisville Intl

Fri 1/9

8:29 am-2:30 pm

1 stop7h 01m

$376

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Thu 12/25

6:29 am-1:12 pm

1 stop5h 43m

Louisville Intl

Mon 12/29

4:39 pm-10:16 pm

1 stop6h 37m

$399

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Fri 1/2

2:06 pm-9:54 pm

1 stop6h 48m

Louisville Intl

Fri 1/9

1:15 pm-9:15 pm

2 stops9h 00m

$411

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Thu 12/25

7:05 am-3:12 pm

1 stop7h 07m

Louisville Intl

Mon 12/29

5:00 am-1:36 pm

2 stops9h 36m

$415

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Fri 1/2

2:15 pm-12:45 am

2 stops9h 30m

Louisville Intl

Fri 1/9

2:30 pm-9:00 pm

2 stops7h 30m

$453

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Fri 12/26

3:10 pm-8:32 pm

1 stop4h 22m

Louisville Intl

Sun 12/28

9:05 am-2:26 pm

1 stop6h 21m

$499

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Fri 4/17

11:14 am-7:44 pm

2 stops7h 30m

Louisville Intl

Sun 4/19

5:34 am-9:25 am

1 stop4h 51m

$531

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Sat 12/20

6:35 pm-12:21 am

1 stop4h 46m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 13 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Louisville flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

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

Currently, September is the cheapest month in which you can book a flight from St. Louis to Louisville (average of $161). Flying from St. Louis to Louisville in October is currently the most expensive (average of $527). 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 STL to SDF?

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

One of the essential ways to save on airfare from St. Louis to Louisville is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 24% on airfare.

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated December 12, 2025.
Peruse reviews from past customers who have flown with Southwest from St. Louis to Louisville to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Boarding

8.1

Overall

7.9

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 4h 17m. 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.

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

    Our cheapest airline available from St. Louis to Louisville is Southwest. Our recent data shows that you can find tickets from as low as $216 on this airline. This flight start at 54% lower than the current average price 3 months from now.

  • 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.

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

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Louisville (average of $161). Flying from St. Louis to Louisville in October is currently the most expensive (average of $527). 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 Louisville?

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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from St. Louis to Louisville

Discover the top airline that operate flights from St. Louis to Louisville. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$216Average$550FlexibilityNo cancel feeOn-time63%

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