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

$129+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
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

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 septiembre 15, 2025.

Round-trip from

$234
(Kiwi.com)

One-way from

$129
(Delta)

Popular in

October

Cheapest in

August

Average price

$334
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. 10% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 septiembre 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
jue. 11/66:00 amSDF - STL
1 stop8h 17mMultiple Airlines
dom. 11/912:20 pmSTL - SDF
1 stop20h 39mMultiple Airlines
Deal found 9/13$234
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
vie. 10/242:57 pmSDF - STL
1 stop25h 59mMultiple Airlines
dom. 11/210:57 amSTL - SDF
1 stop22h 55mMultiple Airlines
Deal found 9/15$251
This American Airlines deal was found by Cheapflights users on 9/13. 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.
vie. 10/246:45 amSDF - STL
1 stop18h 09mAmerican Airlines
lun. 10/272:15 pmSTL - SDF
1 stop7h 48mAmerican Airlines
Deal found 9/13$319
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
vie. 10/247:15 amSDF - STL
2 stops15h 59mMultiple Airlines
dom. 10/2610:57 amSTL - SDF
1 stop21h 34mMultiple Airlines
Deal found 9/13$322
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
vie. 9/1910:14 amSDF - STL
2 stops23h 52mMultiple Airlines
dom. 9/2110:35 amSTL - SDF
1 stop22h 52mMultiple Airlines
Deal found 9/12$382
This Southwest deal was found by Cheapflights users on 9/13. 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.
vie. 10/245:40 amSDF - STL
1 stop6h 50mSouthwest
lun. 10/2710:55 amSTL - SDF
2 stops7h 30mSouthwest
Deal found 9/13$393
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
sáb. 9/208:23 amSDF - STL
1 stop26h 17mMultiple Airlines
lun. 9/224:00 pmSTL - SDF
2 stops16h 19mMultiple Airlines
Deal found 9/12$402
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
sáb. 9/208:23 amSDF - STL
1 stop26h 17mMultiple Airlines
mié. 9/247:55 pmSTL - SDF
2 stops47h 17mMultiple Airlines
Deal found 9/12$415
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
jue. 9/186:36 pmSDF - STL
2 stops39h 30mMultiple Airlines
dom. 9/2110:35 amSTL - SDF
1 stop10h 29mMultiple Airlines
Deal found 9/12$435

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 septiembre 15, 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

vie. 10/24

2:57 pm-3:56 pm

1 stop25h 59m

Lambert-St Louis

dom. 11/2

12:20 pm-7:15 pm

2 stops29h 55m

$261

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

vie. 10/24

6:45 am-11:54 pm

1 stop18h 09m

Lambert-St Louis

lun. 10/27

2:15 pm-11:03 pm

1 stop7h 48m

$319

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

vie. 10/24

7:15 am-5:47 pm

1 stop11h 32m

Lambert-St Louis

dom. 10/26

10:57 am-9:31 am

1 stop21h 34m

$353

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

vie. 10/24

5:40 am-11:30 am

1 stop6h 50m

Lambert-St Louis

lun. 10/27

10:55 am-7:25 pm

2 stops7h 30m

$393

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

jue. 9/18

6:36 pm-9:06 am

2 stops39h 30m

Lambert-St Louis

dom. 9/21

10:35 am-10:04 pm

1 stop10h 29m

$435

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

sáb. 9/20

8:23 am-9:40 am

1 stop26h 17m

Lambert-St Louis

dom. 9/21

4:00 pm-10:27 am

2 stops17h 27m

$445

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

vie. 9/26

10:14 am-9:06 am

2 stops23h 52m

Lambert-St Louis

dom. 9/28

10:35 am-10:27 am

1 stop22h 52m

$467

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

mar. 9/30

8:10 am-12:21 pm

1 stop5h 11m

Lambert-St Louis

sáb. 10/4

6:00 am-11:49 am

1 stop4h 49m

$473

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

lun. 9/29

5:48 pm-9:37 pm

1 stop4h 49m

Lambert-St Louis

vie. 10/3

3:23 pm-10:30 pm

1 stop6h 07m

$473

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

vie. 9/26

6:12 pm-9:53 pm

1 stop4h 41m

Lambert-St Louis

dom. 9/28

7:22 am-2:51 pm

1 stop6h 29m

$473

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 17 results
1
2

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, August is the cheapest month in which you can book a flight from Louisville to St. Louis (average of $311). Flying from Louisville to St. Louis in March is currently the most expensive (average of $356). 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 septiembre 15, 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 morning tend to be the most expensive. A flight at noon could potentially save you up to 12% 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 septiembre 15, 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
8.0
Very good
7,954 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 Southwest can get you from Louisville to St. Louis in just under 6h 50m. Your travel time can differ by up to 11h 19m. 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 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Louisville to St. Louis one-way?

    $129 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $194 and $237, respectively.

  • 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, August is the cheapest month in which you can book a flight from Louisville to St. Louis (average of $311). Flying from Louisville to St. Louis in March is currently the most expensive (average of $356). 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
Eureka
Glencoe
St. Peters
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
Knoxville to St. Louis flights
Nashville to St. Louis flights
Louisville to Kansas City flights
Knoxville to Kansas City flights
Lexington to Kansas City flights
Cincinnati to St. Louis flights
Blountville to Kansas City flights
Knoxville to Springfield flights
Cincinnati to Springfield flights
Nashville to Springfield flights
Lexington to St. Louis flights
Lexington to Springfield flights
Knoxville to Joplin flights
Louisville to Springfield flights
Blountville to St. Louis flights
Blountville to Springfield flights
Huntington to Springfield flights
Owensboro 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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$374FlexibilityNo 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.