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Cheap flights from Louisville to St. Louis from $155

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 7/7. 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

Find the cheapest flights from Louisville to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:19 pm - 11:59 pm
SDF
-
STL
27h 40m
1 stop
Multiple Airlines Logo
4:57 pm - 8:36 am
STL
-
SDF
14h 39m
2 stops
$306Multiple Airlines
Sun, Jul 19 - Fri, Jul 24
Southwest Logo
5:00 pm - 9:10 pm
SDF
-
STL
5h 10m
1 stop
Southwest Logo
1:40 pm - 9:30 pm
STL
-
SDF
6h 50m
1 stop
$309Southwest
Tue, Sep 1 - Tue, Sep 8
Southwest Logo
12:10 pm - 6:45 pm
SDF
-
STL
7h 35m
1 stop
Southwest Logo
10:45 am - 8:35 pm
STL
-
SDF
8h 50m
2 stops
$314Southwest
Tue, Sep 1 - Tue, Sep 8
American Airlines Logo
11:05 am - 2:02 pm
SDF
-
STL
3h 57m
1 stop
American Airlines Logo
2:35 pm - 10:04 pm
STL
-
SDF
6h 29m
1 stop
$315American Airlines
Tue, Jun 30 - Sat, Jul 4
Southwest Logo
5:30 am - 11:20 am
SDF
-
STL
6h 50m
2 stops
Southwest Logo
10:45 am - 8:35 pm
STL
-
SDF
8h 50m
2 stops
$319Southwest
Tue, Sep 1 - Tue, Sep 8
Southwest Logo
1:45 pm - 6:05 pm
SDF
-
STL
5h 20m
1 stop
Southwest Logo
5:35 am - 1:35 pm
STL
-
SDF
7h 00m
1 stop
$345Southwest
Thu, Aug 6 - Mon, Aug 10
Southwest Logo
3:20 pm - 7:10 pm
SDF
-
STL
4h 50m
1 stop
Southwest Logo
5:45 am - 1:05 pm
STL
-
SDF
6h 20m
2 stops
$350Southwest
Thu, Aug 6 - Mon, Aug 10
Southwest Logo
8:45 am - 12:35 pm
SDF
-
STL
4h 50m
1 stop
Southwest Logo
5:20 pm - 12:30 am
STL
-
SDF
6h 10m
1 stop
$352Southwest
Tue, Jul 14 - Mon, Jul 20
Southwest Logo
5:35 am - 11:30 am
SDF
-
STL
6h 55m
1 stop
Southwest Logo
10:15 am - 8:55 pm
STL
-
SDF
9h 40m
2 stops
$355Southwest
Tue, Jun 30 - Sat, Jul 4
Southwest Logo
8:45 am - 11:15 am
SDF
-
STL
3h 30m
1 stop
Southwest Logo
3:35 pm - 12:30 am
STL
-
SDF
7h 55m
2 stops
$357Southwest
Tue, Jul 14 - Mon, Jul 20

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Southwest flights from Louisville to St. Louis

Our best Southwest deals on Louisville to St. Louis flight tickets
Southwest
Sep 1
SDF5:00 pmLouisville Intl
5h 10m
1 stop
STL9:10 pmLambert-St Louis
Sep 8
STL1:40 pmLambert-St Louis
6h 50m
1 stop
SDF9:30 pmLouisville Intl
$309
Southwest
Sep 1
SDF12:10 pmLouisville Intl
7h 35m
1 stop
STL6:45 pmLambert-St Louis
Sep 8
STL10:45 amLambert-St Louis
8h 50m
2 stops
SDF8:35 pmLouisville Intl
$314
Southwest
Sep 1
SDF5:30 amLouisville Intl
6h 50m
2 stops
STL11:20 amLambert-St Louis
Sep 8
STL10:45 amLambert-St Louis
8h 50m
2 stops
SDF8:35 pmLouisville Intl
$319

American Airlines flights from Louisville to St. Louis

Our best American Airlines deals on Louisville to St. Louis flight tickets
American Airlines
Jun 30
SDF11:05 amLouisville Intl
3h 57m
1 stop
STL2:02 pmLambert-St Louis
Jul 4
STL2:35 pmLambert-St Louis
6h 29m
1 stop
SDF10:04 pmLouisville Intl
$315
American Airlines
Jun 29
SDF3:22 pmLouisville Intl
4h 38m
1 stop
STL7:00 pmLambert-St Louis
Jul 1
STL2:32 pmLambert-St Louis
6h 47m
1 stop
SDF10:19 pmLouisville Intl
$417
American Airlines
Jun 29
SDF12:00 pmLouisville Intl
6h 19m
1 stop
STL5:19 pmLambert-St Louis
Jul 1
STL1:42 pmLambert-St Louis
7h 45m
2 stops
SDF10:27 pmLouisville Intl
$483

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 June 17, 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

Sun 7/19

9:19 pm-11:59 pm

1 stop27h 40m

Lambert-St Louis

Fri 7/24

4:57 pm-8:36 am

2 stops14h 39m

$306

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/1

5:00 pm-9:10 pm

1 stop5h 10m

Lambert-St Louis

Tue 9/8

1:40 pm-9:30 pm

1 stop6h 50m

$309

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/1

12:10 pm-6:45 pm

1 stop7h 35m

Lambert-St Louis

Tue 9/8

10:45 am-8:35 pm

2 stops8h 50m

$314
Quickest round-trip

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 6/30

11:05 am-2:02 pm

1 stop3h 57m

Lambert-St Louis

Sat 7/4

2:35 pm-10:04 pm

1 stop6h 29m

$315

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/1

5:30 am-11:20 am

2 stops6h 50m

Lambert-St Louis

Tue 9/8

10:45 am-8:35 pm

2 stops8h 50m

$319

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 8/6

1:45 pm-6:05 pm

1 stop5h 20m

Lambert-St Louis

Mon 8/10

5:35 am-1:35 pm

1 stop7h 00m

$345

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 8/6

3:20 pm-7:10 pm

1 stop4h 50m

Lambert-St Louis

Mon 8/10

5:45 am-1:05 pm

2 stops6h 20m

$350

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 7/14

8:45 am-12:35 pm

1 stop4h 50m

Lambert-St Louis

Mon 7/20

5:20 pm-12:30 am

1 stop6h 10m

$352

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 6/30

5:35 am-11:30 am

1 stop6h 55m

Lambert-St Louis

Sat 7/4

10:15 am-8:55 pm

2 stops9h 40m

$355

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 7/14

8:45 am-11:15 am

1 stop3h 30m

Lambert-St Louis

Mon 7/20

3:35 pm-12:30 am

2 stops7h 55m

$357

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 airline that flies from Louisville Intl to Lambert-St Louis?

American Airlines and Southwest are the most popular carriers operating from Louisville Intl to Lambert-St Louis

What airlines fly to St. Louis?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to St. Louis from Louisville according to our data. American Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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

4h 02m

Direct flights

None
The fastest flight from Louisville to St. Louis takes 4h 02m
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. 4h 02m 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
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Clayton
Fenton
Farmington
Festus
Eureka
Litchfield
Edwardsville
Grafton
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.

An easier way to manage your St. Louis trip

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