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$94+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 July 3, 2025.

Round-trip from

$215
(Mytrip)

One-way from

$94
(American Airlines)

Popular in

May

Cheapest in

August

Average price

$375
From Louisville Intl to Lambert-St Louis
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One-way flight from Louisville Intl to Lambert-St Louis
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/2. 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 12/67:12 pmSDF - STL
1 stop3h 35mAmerican Airlines
Wed 12/105:58 amSTL - SDF
1 stop10h 14mAmerican Airlines
Deal found 7/2$201
This Mytrip deal was found by Cheapflights users on 7/3. 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.
Sat 8/210:54 amSDF - STL
2 stops23h 58mMultiple Airlines
Sat 8/910:45 amSTL - SDF
1 stop9h 03mMultiple Airlines
Deal found 7/3$215
This Delta deal was found by Cheapflights users on 7/3. 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 8/28:05 amSDF - STL
1 stop5h 13mDelta
Sat 8/910:05 amSTL - SDF
1 stop6h 02mDelta
Deal found 7/3$235
This Southwest deal was found by Cheapflights users on 7/2. 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 9/54:20 pmSDF - STL
2 stops7h 15mSouthwest
Sat 9/67:15 amSTL - SDF
1 stop4h 30mSouthwest
Deal found 7/2$258
This Mytrip deal was found by Cheapflights users on 7/2. 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.
Thu 7/1712:32 pmSDF - STL
2 stops22h 20mSpirit Airlines
Mon 7/2110:47 amSTL - SDF
3 stops31h 21mSpirit Airlines
Deal found 7/2$359
This United Airlines deal was found by Cheapflights users on 7/3. 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 7/196:08 pmSDF - STL
1 stop4h 27mUnited Airlines
Mon 7/215:30 pmSTL - SDF
1 stop3h 44mUnited Airlines
Deal found 7/3$453

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 July 3, 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

Sat 8/2

10:54 am-9:52 am

2 stops23h 58m

Lambert-St Louis

Sat 8/9

10:45 am-8:48 pm

1 stop9h 03m

$215

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 8/2

8:05 am-12:18 pm

1 stop5h 13m

Lambert-St Louis

Sat 8/9

10:05 am-5:07 pm

1 stop6h 02m

$235

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 9/5

4:20 pm-10:35 pm

2 stops7h 15m

Lambert-St Louis

Sat 9/6

7:15 am-12:45 pm

1 stop4h 30m

$258

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 9/5

1:09 pm-8:32 pm

2 stops8h 23m

Lambert-St Louis

Sat 9/6

7:23 am-4:30 pm

2 stops8h 07m

$263

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 7/17

12:32 pm-9:52 am

2 stops22h 20m

Lambert-St Louis

Mon 7/21

10:47 am-7:08 pm

3 stops31h 21m

$359

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 7/19

6:08 pm-9:35 pm

1 stop4h 27m

Lambert-St Louis

Mon 7/21

5:30 pm-10:14 pm

1 stop3h 44m

$453

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/9

7:00 am-1:23 pm

1 stop7h 23m

$94

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 8/30

10:45 am-2:28 pm

1 stop4h 43m

$110

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sun 8/31

9:05 am-12:25 pm

1 stop4h 20m

$144

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 8/29

4:20 pm-10:35 pm

2 stops7h 15m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 12 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 July 3, 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 July 3, 2025.
Read through reviews of airlines operating flights from Louisville to St. Louis, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,086 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

  • What are the cheapest airlines flying from Louisville to St. Louis round-trip?

    According to our current data, Delta ($235), Southwest ($258), and American Airlines ($263) offers the cheapest pricing from Louisville to St. Louis. Delta is 31% 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?

    $94 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $110 and $144, 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 Louisville?

Book flights to Louisville if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Festus
Chesterfield
Farmington

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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$226Average$355FlexibilityNo cancel feeOn-timeN/A

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