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Cheap flights from Louisville to St. Louis from $138

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Louisville to St. Louis departing on 5/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Louisville to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:20 am - 8:41 am
SDF
-
STL
4h 21m
1 stop
United Airlines Logo
5:41 pm - 10:30 pm
STL
-
SDF
3h 49m
1 stop
$311United Airlines
Thu, May 28 - Mon, Jun 1
Southwest Logo
8:40 am - 12:55 pm
SDF
-
STL
5h 15m
1 stop
Southwest Logo
1:45 pm - 9:45 pm
STL
-
SDF
7h 00m
2 stops
$316Southwest
Thu, May 28 - Mon, Jun 1
Southwest Logo
5:25 pm - 10:40 pm
SDF
-
STL
6h 15m
2 stops
Southwest Logo
1:45 pm - 9:45 pm
STL
-
SDF
7h 00m
2 stops
$321Southwest
Thu, May 28 - Mon, Jun 1
American Airlines Logo
5:43 pm - 11:44 pm
SDF
-
STL
7h 01m
1 stop
American Airlines Logo
6:12 pm - 12:28 am
STL
-
SDF
5h 16m
1 stop
$326American Airlines
Wed, May 27 - Mon, Jun 1
American Airlines Logo
12:00 pm - 5:20 pm
SDF
-
STL
6h 20m
1 stop
American Airlines Logo
6:12 pm - 12:28 am
STL
-
SDF
5h 16m
1 stop
$329American Airlines
Wed, May 27 - Mon, Jun 1
American Airlines Logo
7:01 pm - 11:46 pm
SDF
-
STL
5h 45m
1 stop
American Airlines Logo
5:21 pm - 11:48 pm
STL
-
SDF
5h 27m
1 stop
$335American Airlines
Fri, Apr 24 - Sat, Apr 25
American Airlines Logo
5:00 am - 8:33 am
SDF
-
STL
4h 33m
1 stop
American Airlines Logo
6:12 pm - 12:28 am
STL
-
SDF
5h 16m
1 stop
$336American Airlines
Wed, May 27 - Mon, Jun 1
Southwest Logo
12:10 pm - 6:00 pm
SDF
-
STL
6h 50m
1 stop
Southwest Logo
1:45 pm - 9:00 pm
STL
-
SDF
6h 15m
1 stop
$353Southwest
Wed, Apr 8 - Fri, Apr 17
Southwest Logo
5:50 pm - 10:35 pm
SDF
-
STL
5h 45m
1 stop
Southwest Logo
1:45 pm - 9:45 pm
STL
-
SDF
7h 00m
2 stops
$358Southwest
Wed, Apr 8 - Fri, Apr 17
Southwest Logo
4:40 pm - 10:10 pm
SDF
-
STL
6h 30m
2 stops
Southwest Logo
1:45 pm - 9:45 pm
STL
-
SDF
7h 00m
2 stops
$363Southwest
Wed, Apr 8 - Fri, Apr 17

Southwest flights from Louisville to St. Louis

Our best Southwest deals on Louisville to St. Louis flight tickets
Southwest
May 28
SDF8:40 amLouisville Intl
5h 15m
1 stop
STL12:55 pmLambert-St Louis
Jun 1
STL1:45 pmLambert-St Louis
7h 00m
2 stops
SDF9:45 pmLouisville Intl
$316
Southwest
May 28
SDF5:25 pmLouisville Intl
6h 15m
2 stops
STL10:40 pmLambert-St Louis
Jun 1
STL1:45 pmLambert-St Louis
7h 00m
2 stops
SDF9:45 pmLouisville Intl
$321
Southwest
Apr 8
SDF12:10 pmLouisville Intl
6h 50m
1 stop
STL6:00 pmLambert-St Louis
Apr 17
STL1:45 pmLambert-St Louis
6h 15m
1 stop
SDF9:00 pmLouisville Intl
$353

American Airlines flights from Louisville to St. Louis

Our best American Airlines deals on Louisville to St. Louis flight tickets
American Airlines
May 27
SDF5:43 pmLouisville Intl
7h 01m
1 stop
STL11:44 pmLambert-St Louis
Jun 1
STL6:12 pmLambert-St Louis
5h 16m
1 stop
SDF12:28 amLouisville Intl
$326
American Airlines
May 27
SDF12:00 pmLouisville Intl
6h 20m
1 stop
STL5:20 pmLambert-St Louis
Jun 1
STL6:12 pmLambert-St Louis
5h 16m
1 stop
SDF12:28 amLouisville Intl
$329
American Airlines
Apr 24
SDF7:01 pmLouisville Intl
5h 45m
1 stop
STL11:46 pmLambert-St Louis
Apr 25
STL5:21 pmLambert-St Louis
5h 27m
1 stop
SDF11:48 pmLouisville Intl
$335

momondo 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, momondo users made 832,500 searches. Data last updated March 15, 2026.
Use the filters below to find and compare flights from Louisville to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 5/28

5:20 am-8:41 am

1 stop4h 21m

Lambert-St Louis

Mon 6/1

5:41 pm-10:30 pm

1 stop3h 49m

$311

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 5/28

8:40 am-12:55 pm

1 stop5h 15m

Lambert-St Louis

Mon 6/1

1:45 pm-9:45 pm

2 stops7h 00m

$316

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 5/28

5:25 pm-10:40 pm

2 stops6h 15m

Lambert-St Louis

Mon 6/1

1:45 pm-9:45 pm

2 stops7h 00m

$321

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 5/27

5:43 pm-11:44 pm

1 stop7h 01m

Lambert-St Louis

Mon 6/1

6:12 pm-12:28 am

1 stop5h 16m

$326

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 5/27

12:00 pm-5:20 pm

1 stop6h 20m

Lambert-St Louis

Mon 6/1

6:12 pm-12:28 am

1 stop5h 16m

$329

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 4/24

7:01 pm-11:46 pm

1 stop5h 45m

Lambert-St Louis

Sat 4/25

5:21 pm-11:48 pm

1 stop5h 27m

$335

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 5/27

5:00 am-8:33 am

1 stop4h 33m

Lambert-St Louis

Mon 6/1

6:12 pm-12:28 am

1 stop5h 16m

$336

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 4/8

12:10 pm-6:00 pm

1 stop6h 50m

Lambert-St Louis

Fri 4/17

1:45 pm-9:00 pm

1 stop6h 15m

$353

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 4/8

5:50 pm-10:35 pm

1 stop5h 45m

Lambert-St Louis

Fri 4/17

1:45 pm-9:45 pm

2 stops7h 00m

$358

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 4/8

4:40 pm-10:10 pm

2 stops6h 30m

Lambert-St Louis

Fri 4/17

1:45 pm-9:45 pm

2 stops7h 00m

$363

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Louisville to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest Louisville Intl to Lambert-St Louis flight route?

Fly from Louisville Intl to Lambert-St Louis for the best Louisville Intl - Lambert-St Louis flight prices

What cabin class options are available on Louisville Intl to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on Louisville Intl to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

When to book flights from Louisville to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Louisville to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Louisville to St. Louis (SDF to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Louisville to St. Louis

Fastest flight time

3h 47m

Direct flights

None
The fastest flight from Louisville to St. Louis takes 3h 47m
There are no direct flights from Louisville to St. Louis. There are no popular flight routes from Louisville to St. Louis.
Search flight deals

  • How far is Louisville Intl to Lambert-St Louis by plane?

    Lambert-St Louis is 241.7 mi away from Louisville Intl. 3h 47m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Louisville Intl Airport to Lambert-St Louis Airport?

    Prices for flights from Louisville Intl Airport to Lambert-St Louis Airport were last updated today.

  • How old do you have to be to fly from Louisville Intl Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
St. Peters
Fenton
Alton
Wentzville
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Louisville to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Louisville to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Louisville to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis from Louisville which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Louisville to St. Louis?

Once you have performed a search for Louisville to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Louisville to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Louisville and alert you when they change.

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