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$95+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Jan 6 — Jan 131
Tue 1/6
Tue 1/13
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 December 7, 2025.

This Priceline deal was found by Cheapflights users on 12/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:05 amSDF - STL
1 stop6h 51mSpirit Airlines
Thu 12/2511:51 amSTL - SDF
1 stop11h 08mSpirit Airlines
Deal found 12/5$329
This Delta deal was found by Cheapflights users on 12/4. 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 12/316:40 amSDF - STL
1 stop5h 32mDelta
Sat 1/36:29 amSTL - SDF
1 stop5h 43mDelta
Deal found 12/4$376
This American Airlines deal was found by Cheapflights users on 12/4. 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 12/315:00 amSDF - STL
2 stops9h 36mAmerican Airlines
Sat 1/34:53 pmSTL - SDF
1 stop5h 23mAmerican Airlines
Deal found 12/4$399
This American Airlines deal was found by Cheapflights users on 12/5. 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.
Sun 12/218:00 amSDF - STL
2 stops9h 46mAmerican Airlines
Thu 12/256:00 amSTL - SDF
1 stop5h 06mAmerican Airlines
Deal found 12/5$415
This Delta deal was found by Cheapflights users on 12/7. 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.
Mon 12/221:52 pmSDF - STL
1 stop4h 09mDelta
Fri 12/266:29 amSTL - SDF
1 stop5h 43mDelta
Deal found 12/7$499
This Mytrip deal was found by Cheapflights users on 12/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:05 amSDF - STL
3 stops14h 31mMultiple Airlines
Thu 12/2511:51 amSTL - SDF
1 stop11h 08mMultiple Airlines
Deal found 12/5$504
This Southwest deal was found by Cheapflights users on 12/4. 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 12/316:45 amSDF - STL
2 stops8h 05mSouthwest
Sat 1/35:05 amSTL - SDF
2 stops8h 45mSouthwest
Deal found 12/4$540
This United Airlines deal was found by Cheapflights users on 12/6. 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 12/1212:20 pmSDF - STL
1 stop5h 43mUnited Airlines
Sun 12/146:30 amSTL - SDF
1 stop5h 42mUnited Airlines
Deal found 12/6$673
This American Airlines deal was found by Cheapflights users on 12/6. 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.
Fri 12/128:47 amSDF - STL
2 stops7h 03mAmerican Airlines
Sun 12/144:49 pmSTL - SDF
1 stop5h 07mAmerican Airlines
Deal found 12/6$678
This Southwest deal was found by Cheapflights users on 12/6. 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.
Fri 12/126:35 amSDF - STL
2 stops8h 40mSouthwest
Sun 12/147:50 amSTL - SDF
2 stops7h 05mSouthwest
Deal found 12/6$692
This Kiwi.com deal was found by Cheapflights users on 12/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:55 amSDF - STL
2 stops11h 38mMultiple Airlines
Sun 12/72:47 pmSTL - SDF
1 stop19h 13mMultiple Airlines
Deal found 12/5$739
This Southwest deal was found by Cheapflights users on 12/5. 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.
Fri 12/511:45 amSDF - STL
1 stop5h 35mSouthwest
Sun 12/75:10 amSTL - SDF
1 stop6h 10mSouthwest
Deal found 12/5$741

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 December 7, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$219
(United Airlines)

One-way from

$95
(Kiwi.com)

Popular in

May

Cheapest in

August

Average price

$249
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. 8% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($19 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 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 December 7, 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

Tue 1/20

6:12 pm-10:58 pm

1 stop5h 46m

Lambert-St Louis

Wed 1/21

9:57 am-5:37 pm

1 stop6h 40m

$219

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 1/13

3:36 pm-6:51 am

2 stops16h 15m

Lambert-St Louis

Tue 1/20

5:42 pm-1:00 pm

1 stop18h 18m

$223

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 1/13

8:29 am-2:30 pm

1 stop7h 01m

Lambert-St Louis

Tue 1/20

6:30 am-1:24 pm

1 stop5h 54m

$257

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 1/13

11:14 am-9:15 pm

2 stops11h 01m

Lambert-St Louis

Tue 1/20

11:05 am-10:05 pm

2 stops10h 00m

$267

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 1/1

6:40 am-11:12 am

1 stop5h 32m

Lambert-St Louis

Thu 1/8

7:10 am-2:42 pm

1 stop6h 32m

$277

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 1/1

5:00 am-1:36 pm

2 stops9h 36m

Lambert-St Louis

Thu 1/8

11:05 am-6:39 pm

1 stop6h 34m

$282

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 1/13

8:29 am-2:30 pm

1 stop7h 01m

Lambert-St Louis

Fri 1/16

3:11 pm-10:30 pm

1 stop6h 19m

$307

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 4/24

7:15 am-10:35 am

1 stop4h 20m

Lambert-St Louis

Sat 4/25

3:23 pm-10:26 pm

1 stop6h 03m

$309

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 1/13

11:14 am-3:04 pm

1 stop4h 50m

Lambert-St Louis

Fri 1/16

11:05 am-10:12 pm

2 stops10h 07m

$312

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sun 12/21

5:05 am-10:56 am

1 stop6h 51m

Lambert-St Louis

Thu 12/25

11:51 am-11:59 pm

1 stop11h 08m

$329

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

Showing 1-10 of 11 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Louisville-St. Louis flight deals on Cheapflights vs. eDreams >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 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 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 April is currently the most expensive (average of $273). 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 December 7, 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 evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 26% 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 December 7, 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
7.9
Good
8,013 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,013 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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?

    United Airlines, American Airlines, and Delta can get you from Louisville to St. Louis in just under 5h 32m. Your travel time can differ by up to 5h 29m. 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 34% 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, 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 April is currently the most expensive (average of $273). 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
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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 December 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$356FlexibilityNo cancel feeOn-timeN/A

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