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Cheap flights from Louisville to St. Louis from $126

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 5/30. 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
0 bags

Find the cheapest flights from Louisville to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
8:10 am - 12:25 pm
SDF
-
STL
5h 15m
1 stop
Delta Logo
7:01 pm - 12:25 am
STL
-
SDF
4h 24m
1 stop
$293Delta
Wed, May 27 - 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
$303American Airlines
Wed, May 27 - Mon, Jun 1
American Airlines Logo
8:08 pm - 11:44 pm
SDF
-
STL
4h 36m
1 stop
American Airlines Logo
6:13 pm - 12:28 am
STL
-
SDF
5h 15m
1 stop
$335American Airlines
Mon, Jun 15 - Tue, Jun 16
Southwest Logo
7:05 am - 2:50 pm
SDF
-
STL
8h 45m
2 stops
Southwest Logo
6:40 am - 3:05 pm
STL
-
SDF
7h 25m
1 stop
$340Southwest
Tue, Sep 29 - Sat, Oct 3
United Airlines Logo
9:00 am - 12:11 pm
SDF
-
STL
4h 11m
1 stop
United Airlines Logo
6:00 am - 1:35 pm
STL
-
SDF
6h 35m
1 stop
$345United Airlines
Tue, Jun 2 - Wed, Jun 3
American Airlines Logo
7:18 pm - 12:16 am
SDF
-
STL
5h 58m
1 stop
American Airlines Logo
2:32 pm - 12:28 am
STL
-
SDF
8h 56m
2 stops
$350American Airlines
Mon, Jun 15 - Tue, Jun 16
Delta Logo
2:34 pm - 5:16 pm
SDF
-
STL
3h 42m
1 stop
Delta Logo
1:39 pm - 7:24 pm
STL
-
SDF
4h 45m
1 stop
$353Delta
Mon, Jun 1 - Sun, Jun 7
American Airlines Logo
3:22 pm - 7:00 pm
SDF
-
STL
4h 38m
1 stop
American Airlines Logo
6:12 pm - 12:28 am
STL
-
SDF
5h 16m
1 stop
$355American Airlines
Wed, May 27 - Mon, Jun 1
Southwest Logo
6:40 am - 8:25 am
SDF
-
STL
2h 45m
1 stop
Southwest Logo
5:35 pm - 10:30 pm
STL
-
SDF
3h 55m
1 stop
$358Southwest
Sat, May 30 - Sun, May 31
Southwest Logo
6:40 am - 8:25 am
SDF
-
STL
2h 45m
1 stop
Southwest Logo
5:25 am - 12:50 pm
STL
-
SDF
6h 25m
2 stops
$364Southwest
Sat, May 30 - Sun, May 31

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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
$303
American Airlines
Jun 15
SDF8:08 pmLouisville Intl
4h 36m
1 stop
STL11:44 pmLambert-St Louis
Jun 16
STL6:13 pmLambert-St Louis
5h 15m
1 stop
SDF12:28 amLouisville Intl
$335
American Airlines
Jun 15
SDF7:18 pmLouisville Intl
5h 58m
1 stop
STL12:16 amLambert-St Louis
Jun 16
STL2:32 pmLambert-St Louis
8h 56m
2 stops
SDF12:28 amLouisville Intl
$350

Southwest flights from Louisville to St. Louis

Our best Southwest deals on Louisville to St. Louis flight tickets
Southwest
Sep 29
SDF7:05 amLouisville Intl
8h 45m
2 stops
STL2:50 pmLambert-St Louis
Oct 3
STL6:40 amLambert-St Louis
7h 25m
1 stop
SDF3:05 pmLouisville Intl
$340
Southwest
May 30
SDF6:40 amLouisville Intl
2h 45m
1 stop
STL8:25 amLambert-St Louis
May 31
STL5:35 pmLambert-St Louis
3h 55m
1 stop
SDF10:30 pmLouisville Intl
$358
Southwest
May 30
SDF6:40 amLouisville Intl
2h 45m
1 stop
STL8:25 amLambert-St Louis
May 31
STL5:25 amLambert-St Louis
6h 25m
2 stops
SDF12:50 pmLouisville Intl
$364

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 May 6, 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

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 5/27

8:10 am-12:25 pm

1 stop5h 15m

Lambert-St Louis

Mon 6/1

7:01 pm-12:25 am

1 stop4h 24m

$293

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

$303

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 6/15

8:08 pm-11:44 pm

1 stop4h 36m

Lambert-St Louis

Tue 6/16

6:13 pm-12:28 am

1 stop5h 15m

$335

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/29

7:05 am-2:50 pm

2 stops8h 45m

Lambert-St Louis

Sat 10/3

6:40 am-3:05 pm

1 stop7h 25m

$340

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 6/2

9:00 am-12:11 pm

1 stop4h 11m

Lambert-St Louis

Wed 6/3

6:00 am-1:35 pm

1 stop6h 35m

$345

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 6/15

7:18 pm-12:16 am

1 stop5h 58m

Lambert-St Louis

Tue 6/16

2:32 pm-12:28 am

2 stops8h 56m

$350

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Mon 6/1

2:34 pm-5:16 pm

1 stop3h 42m

Lambert-St Louis

Sun 6/7

1:39 pm-7:24 pm

1 stop4h 45m

$353

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 5/27

3:22 pm-7:00 pm

1 stop4h 38m

Lambert-St Louis

Mon 6/1

6:12 pm-12:28 am

1 stop5h 16m

$355
Quickest round-trip

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 5/30

6:40 am-8:25 am

1 stop2h 45m

Lambert-St Louis

Sun 5/31

5:35 pm-10:30 pm

1 stop3h 55m

$358

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 5/30

6:40 am-8:25 am

1 stop2h 45m

Lambert-St Louis

Sun 5/31

5:25 am-12:50 pm

2 stops6h 25m

$364

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

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

2h 45m

Direct flights

None
The fastest flight from Louisville to St. Louis takes 2h 45m
There are no direct flights from Louisville to St. Louis. There are no popular flight routes from Louisville to St. Louis.
Search flight deals

Frequently asked questions about flying from Louisville to St. Louis

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

    Lambert-St Louis is 241.7 mi away from Louisville Intl. 2h 45m 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

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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