HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$102+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 23, 2025.

This Delta deal was found by Cheapflights users on 12/20. 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.
Sun 12/2112:21 pmSDF - STL
1 stop5h 07mDelta
Tue 1/201:00 pmSTL - SDF
1 stop5h 39mDelta
Deal found 12/20$529
This Delta deal was found by Cheapflights users on 12/20. 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.
Sun 12/218:30 amSDF - STL
1 stop7h 00mDelta
Thu 1/16:29 amSTL - SDF
1 stop5h 43mDelta
Deal found 12/20$531
This American Airlines deal was found by Cheapflights users on 12/20. 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 12/219:20 amSDF - STL
2 stops8h 26mAmerican Airlines
Tue 1/208:13 amSTL - SDF
1 stop5h 35mAmerican Airlines
Deal found 12/20$534
This American Airlines deal was found by Cheapflights users on 12/20. 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 12/213:44 pmSDF - STL
2 stops9h 00mAmerican Airlines
Thu 1/12:04 pmSTL - SDF
1 stop7h 10mAmerican Airlines
Deal found 12/20$536
This American Airlines deal was found by Cheapflights users on 12/20. 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
1 stop6h 14mAmerican Airlines
Thu 1/1511:05 amSTL - SDF
1 stop6h 34mAmerican Airlines
Deal found 12/20$566
This American Airlines deal was found by Cheapflights users on 12/20. 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 12/318:00 amSDF - STL
2 stops9h 23mAmerican Airlines
Mon 1/54:53 pmSTL - SDF
1 stop4h 01mAmerican Airlines
Deal found 12/20$574
This American Airlines deal was found by Cheapflights users on 12/20. 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 12/249:20 amSDF - STL
1 stop25h 39mAmerican Airlines
Sun 12/287:05 amSTL - SDF
1 stop7h 07mAmerican Airlines
Deal found 12/20$647

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 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$184
(Kiwi.com)

One-way from

$102
(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 23, 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

3:36 pm-11:33 pm

2 stops32h 57m

Lambert-St Louis

Tue 1/27

5:42 pm-1:00 pm

1 stop18h 18m

$184

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 1/22

3:36 pm-10:23 am

2 stops19h 47m

Lambert-St Louis

Sun 1/25

5:42 pm-1:00 pm

1 stop18h 18m

$219

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 1/20

6:00 am-2:50 pm

2 stops9h 50m

Lambert-St Louis

Tue 1/27

6:00 am-2:48 pm

2 stops7h 48m

$267

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 1/28

7:00 am-11:54 am

1 stop5h 54m

Lambert-St Louis

Mon 2/2

3:45 pm-8:56 pm

1 stop4h 11m

$294

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 1/28

6:00 am-2:50 pm

2 stops9h 50m

Lambert-St Louis

Mon 2/2

8:31 am-6:39 pm

1 stop9h 08m

$299

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 1/28

11:50 am-5:30 pm

2 stops6h 40m

Lambert-St Louis

Mon 2/2

1:10 pm-10:45 pm

2 stops8h 35m

$304

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sun 1/18

6:00 am-11:05 am

1 stop6h 05m

Lambert-St Louis

Sun 1/25

7:10 am-2:36 pm

1 stop6h 26m

$309

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sun 1/18

6:00 am-9:40 am

1 stop4h 40m

Lambert-St Louis

Sun 1/25

6:00 am-6:30 pm

2 stops11h 30m

$314

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 2/3

6:12 pm-10:58 pm

1 stop5h 46m

Lambert-St Louis

Wed 2/4

11:20 am-5:37 pm

1 stop5h 17m

$317

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 1/26

1:55 pm-11:33 pm

1 stop10h 38m

$102

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 16 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 23, 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 23, 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
8,014 reviews

Entertainment

7.9

Crew

8.5

Overall

7.9

Food

7.3

Boarding

8.1

Comfort

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
8,014 reviews
Delta
7.9
Good
8,014 reviews

Entertainment

7.9

Crew

8.5

Overall

7.9

Food

7.3

Boarding

8.1

Comfort

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?

    American Airlines and Delta can get you from Louisville to St. Louis in just under 5h 54m. Your travel time can differ by up to 3h 56m. 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Louisville to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Kansas City flights
Cincinnati to Kansas City flights
Nashville to St. Louis flights
Cincinnati to St. Louis flights
Louisville to Kansas City flights
Knoxville to Kansas City flights
Lexington to Kansas City flights
Knoxville to Springfield flights
Nashville to Springfield flights
Knoxville to St. Louis flights
Blountville to Kansas City flights
Lexington to St. Louis flights
Cincinnati to Springfield flights
Lexington to Springfield flights
Knoxville to Joplin flights
Louisville to Springfield flights
Blountville to Springfield flights
Owensboro to St. Louis flights
Huntington to Springfield flights
Blountville to St. Louis flights
Huntington to Kansas City flights
Nashville to Quincy flights

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 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$356FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.