$115+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SDF
Sep 8 — Sep 151
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Louisville 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 St. Louis to Louisville
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Cheapest flights from St. Louis to LouisvilleExplore 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 August 9, 2026.
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 August 9, 2026.
This United Airlines deal was found by Cheapflights users on 8/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:59 pm -
1 stop6h 37m
Sun 9/612:33 pm -
1 stop5h 33m
Deal found 8/5![United Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 8/5. 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.
Sat 9/51:40 pm -
2 stops6h 45m
Sun 9/61:30 pm -
1 stop6h 20m
Deal found 8/5![Southwest logo]()
$266
This Delta deal was found by Cheapflights users on 8/7. 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 8/317:00 am -
1 stop4h 21m
Tue 9/16:00 am -
1 stop6h 46m
Deal found 8/7![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 8/7. 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.
Mon 8/318:30 am -
2 stops9h 00m
Tue 9/16:00 am -
1 stop5h 20m
Deal found 8/7![Southwest logo]()
$304
This Southwest deal was found by Cheapflights users on 8/7. 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 9/44:15 pm -
1 stop5h 25m
Fri 9/116:45 am -
1 stop4h 30m
Deal found 8/7![Southwest logo]()
$307
This KAYAK deal was found by Cheapflights users on 8/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am -
1 stop4h 21m
Mon 8/316:00 am -
1 stop4h 20m
Deal found 8/5![Delta logo]()
$312
This American Airlines deal was found by Cheapflights users on 8/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:31 am -
2 stops8h 54m
Sun 9/66:45 pm -
1 stop6h 13m
Deal found 8/8![American Airlines logo]()
$316
This Southwest deal was found by Cheapflights users on 8/5. 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.
Thu 10/85:25 am -
1 stop3h 45m
Mon 10/1212:10 pm -
2 stops9h 50m
Deal found 8/5![Southwest logo]()
$331
This Southwest deal was found by Cheapflights users on 8/8. 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.
Sat 9/56:45 am -
1 stop4h 55m
Sat 9/129:55 am -
1 stop5h 05m
Deal found 8/8![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 8/5. 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.
Wed 10/72:25 pm -
2 stops7h 35m
Mon 10/1212:10 pm -
2 stops9h 50m
Deal found 8/5![Southwest logo]()
$337
Best flights from St. Louis to LouisvilleDiscover carefully curated flight deals from St. Louis to Louisville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
Discover carefully curated flight deals from St. Louis to Louisville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
This Delta deal was found by Cheapflights users on 8/7. 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 8/317:00 am -
1 stop4h 21m
Tue 9/16:00 am -
1 stop6h 46m
Deal found 8/7![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 8/7. 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 9/44:15 pm -
1 stop5h 25m
Fri 9/116:45 am -
1 stop4h 30m
Deal found 8/7![Southwest logo]()
$307
This United Airlines deal was found by Cheapflights users on 8/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/138:00 am -
1 stop4h 11m
Tue 9/159:00 am -
1 stop3h 57m
Deal found 8/5![United Airlines logo]()
$352
This Southwest deal was found by Cheapflights users on 8/8. 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.
Sat 9/56:45 am -
1 stop4h 55m
Sat 9/129:55 am -
1 stop5h 05m
Deal found 8/8![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 8/7. 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.
Thu 10/87:20 pm -
1 stop3h 39m
Sun 10/116:00 am -
1 stop5h 51m
Deal found 8/7![Delta logo]()
$352
This United Airlines deal was found by Cheapflights users on 8/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:30 am -
1 stop5h 09m
Sat 10/106:16 pm -
1 stop4h 05m
Deal found 8/5![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 8/5. 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.
Sat 9/51:40 pm -
2 stops6h 45m
Sun 9/610:00 am -
2 stops5h 55m
Deal found 8/5![Southwest logo]()
$345
This Delta deal was found by Cheapflights users on 8/7. 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.
Sun 8/307:00 am -
1 stop4h 21m
Tue 9/16:00 am -
1 stop4h 20m
Deal found 8/7![Delta logo]()
$362
This Southwest deal was found by Cheapflights users on 8/4. 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.
Sun 9/136:00 am -
2 stops7h 10m
Tue 9/156:00 am -
1 stop5h 20m
Deal found 8/4![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 8/5. 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.
Sun 9/138:20 am -
1 stop7h 50m
Wed 9/1610:50 am -
2 stops8h 05m
Deal found 8/5![Southwest logo]()
$367
Last-minute flights from St. Louis to LouisvilleDiscover last-minute flight deals from St. Louis to Louisville. Data last updated August 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Louisville. Data last updated August 9, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 8/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am -
1 stop4h 21m
Mon 8/316:00 am -
1 stop4h 20m
Deal found 8/5![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 8/7. 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 8/317:00 am -
1 stop4h 21m
Tue 9/16:00 am -
1 stop6h 46m
Deal found 8/7![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 8/7. 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.
Mon 8/318:30 am -
2 stops9h 00m
Tue 9/16:00 am -
1 stop5h 20m
Deal found 8/7![Southwest logo]()
$304
This Southwest deal was found by Cheapflights users on 8/7. 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 9/44:15 pm -
1 stop5h 25m
Fri 9/116:45 am -
1 stop4h 30m
Deal found 8/7![Southwest logo]()
$307
This United Airlines deal was found by Cheapflights users on 8/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:59 pm -
1 stop6h 37m
Sun 9/612:33 pm -
1 stop5h 33m
Deal found 8/5![United Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 8/5. 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.
Sat 9/51:40 pm -
2 stops6h 45m
Sun 9/61:30 pm -
1 stop6h 20m
Deal found 8/5![Southwest logo]()
$266
This American Airlines deal was found by Cheapflights users on 8/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:31 am -
2 stops8h 54m
Sun 9/66:45 pm -
1 stop6h 13m
Deal found 8/8![American Airlines logo]()
$316
This Southwest deal was found by Cheapflights users on 8/8. 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.
Sat 9/56:45 am -
1 stop4h 55m
Sat 9/129:55 am -
1 stop5h 05m
Deal found 8/8![Southwest logo]()
$333
One-way flights from St. Louis to LouisvilleSearch for one-way flight options from St. Louis to Louisville. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
Search for one-way flight options from St. Louis to Louisville. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:17 pm -
2 stops38h 54m
Deal found 8/8![Multiple Airlines logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:17 pm -
2 stops39h 15m
Deal found 8/7![Multiple Airlines logo]()
$128
This Delta deal was found by Cheapflights users on 8/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am -
1 stop6h 18m
Deal found 8/8![Delta logo]()
$131
This Southwest deal was found by Cheapflights users on 8/8. 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.
Sat 9/51:40 pm -
2 stops6h 45m
Deal found 8/8![Southwest logo]()
$136
This Southwest deal was found by Cheapflights users on 8/6. 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.
Mon 10/55:50 pm -
1 stop3h 40m
Deal found 8/6![Southwest logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:17 pm -
2 stops15h 12m
Deal found 8/7![Multiple Airlines logo]()
$157
This Southwest deal was found by Cheapflights users on 8/7. 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 9/47:20 am -
1 stop7h 20m
Deal found 8/7![Southwest logo]()
$177
This United Airlines deal was found by Cheapflights users on 8/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:25 am -
1 stop4h 46m
Deal found 8/8![United Airlines logo]()
$203
This American Airlines deal was found by Cheapflights users on 8/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/305:00 am -
1 stop4h 35m
Deal found 8/7![American Airlines logo]()
$213
This Southwest deal was found by Cheapflights users on 8/6. 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.
Sun 9/206:00 am -
2 stops7h 10m
Deal found 8/6![Southwest logo]()
$218
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 August 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $261 (United Airlines) |
One-way from | $115 (Kiwi.com) |
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 August 9, 2026.
Use the filters below to find and compare flights from St. Louis to Louisville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Mon 8/31
7:00 am-12:21 pm
1 stop4h 21m
Louisville Intl
Tue 9/1
6:00 am-11:46 am
1 stop6h 46m
$299
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Fri 9/4
4:15 pm-10:40 pm
1 stop5h 25m
Louisville Intl
Fri 9/11
6:45 am-10:15 am
1 stop4h 30m
$307
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Sat 9/5
6:45 am-12:40 pm
1 stop4h 55m
Louisville Intl
Sat 9/12
9:55 am-2:00 pm
1 stop5h 05m
$333
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Sat 9/5
1:40 pm-9:25 pm
2 stops6h 45m
Louisville Intl
Sun 9/6
10:00 am-2:55 pm
2 stops5h 55m
$345
Quickest round-trip
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Sun 9/13
8:00 am-1:11 pm
1 stop4h 11m
Louisville Intl
Tue 9/15
9:00 am-11:57 am
1 stop3h 57m
$352
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Thu 10/8
7:20 pm-11:59 pm
1 stop3h 39m
Louisville Intl
Sun 10/11
6:00 am-10:51 am
1 stop5h 51m
$352
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Sun 8/30
7:00 am-12:21 pm
1 stop4h 21m
Louisville Intl
Tue 9/1
6:00 am-9:20 am
1 stop4h 20m
$362
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Sun 9/13
6:00 am-2:10 pm
2 stops7h 10m
Louisville Intl
Tue 9/15
6:00 am-10:20 am
1 stop5h 20m
$367
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Sun 9/13
8:20 am-5:10 pm
1 stop7h 50m
Louisville Intl
Wed 9/16
10:50 am-5:55 pm
2 stops8h 05m
$367
St. LouisLouisville
STL Lambert-St Louis - SDF Louisville Intl
STLSDF
Lambert-St Louis
Tue 10/6
8:30 am-2:39 pm
1 stop5h 09m
Louisville Intl
Sat 10/10
6:16 pm-9:21 pm
1 stop4h 05m
$369
Showing 1-10 of 20 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Louisville flight deals on Cheapflights vs. FlightHub >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 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 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.
STL-SDF
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.
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.
Traveling to a place near Louisville?
Book flights to Louisville if you plan to visit one of these locationsCorydon
Shepherdsville
Elizabethtown
Jeffersonville
Bardstown
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