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Cheap flights from Louisville to St. Louis from $99

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 9/16. 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

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Cheap round-trip flights

American Airlines Logo
6:00 am - 9:16 amSDF-STL
4h 16m1 stop
American Airlines Logo
6:10 am - 2:03 pmSTL-SDF
6h 53m1 stop
$187American Airlines
Find Deal
Tue, Sep 16 - Sat, Sep 20
American Airlines Logo
1:16 pm - 8:32 pmSDF-STL
8h 16m2 stops
American Airlines Logo
6:10 am - 5:38 pmSTL-SDF
10h 28m1 stop
$192American Airlines
Find Deal
Tue, Sep 16 - Sat, Sep 20
Delta Logo
12:45 pm - 4:06 pmSDF-STL
4h 21m1 stop
Delta Logo
5:30 pm - 11:00 pmSTL-SDF
4h 30m1 stop
$197Delta
Find Deal
Wed, Aug 27 - Wed, Sep 3
Delta Logo
6:00 am - 9:15 amSDF-STL
4h 15m1 stop
Delta Logo
7:00 am - 11:45 amSTL-SDF
3h 45m1 stop
$242Delta
Find Deal
Fri, Sep 5 - Sat, Sep 6
Spirit Airlines Logo
8:40 pm - 9:40 amSDF-STL
14h 00m1 stop
Spirit Airlines Logo
10:35 am - 7:35 pmSTL-SDF
8h 00m1 stop
$256Spirit Airlines
Find Deal
Wed, Oct 15 - Sun, Oct 19
Southwest Logo
5:50 am - 11:30 amSDF-STL
6h 40m2 stops
Southwest Logo
2:45 pm - 11:30 pmSTL-SDF
7h 45m2 stops
$275Southwest
Find Deal
Sat, Sep 20 - Mon, Sep 22
Southwest Logo
7:15 am - 1:10 pmSDF-STL
6h 55m2 stops
Southwest Logo
7:50 am - 4:45 pmSTL-SDF
7h 55m2 stops
$296Southwest
Find Deal
Wed, Sep 10 - Fri, Sep 12
Logo
10:14 am - 12:00 pmSDF-STL
26h 46m3 stops
Logo
10:35 am - 10:28 pmSTL-SDF
10h 53m1 stop
$341
Find Deal
Thu, Sep 4 - Sun, Sep 7
Spirit Airlines Logo
7:58 pm - 9:40 amSDF-STL
14h 42m1 stop
Spirit Airlines Logo
2:30 pm - 6:53 pmSTL-SDF
27h 23m3 stops
$355Spirit Airlines
Find Deal
Sat, Aug 16 - Sun, Aug 17
Logo
10:14 am - 9:40 amSDF-STL
24h 26m2 stops
Logo
12:05 pm - 10:27 amSTL-SDF
21h 22m3 stops
$361
Find Deal
Sat, Sep 13 - Sun, Sep 14

American Airlines flights from Louisville to St. Louis

Our best American Airlines deals on Louisville to St. Louis flight tickets
American Airlines
Sep 16
SDF6:00 amLouisville Intl
4h 16m
1 stop
STL9:16 amLambert-St Louis
Sep 20
STL6:10 amLambert-St Louis
6h 53m
1 stop
SDF2:03 pmLouisville Intl
$187
Find similar
American Airlines
Sep 16
SDF1:16 pmLouisville Intl
8h 16m
2 stops
STL8:32 pmLambert-St Louis
Sep 20
STL6:10 amLambert-St Louis
10h 28m
1 stop
SDF5:38 pmLouisville Intl
$192
Find similar
American Airlines
Sep 20
SDF7:00 amLouisville Intl
14h 32m
1 stop
STL8:32 pmLambert-St Louis
Sep 22
STL2:11 pmLambert-St Louis
6h 25m
1 stop
SDF9:36 pmLouisville Intl
$198
Find similar

Delta flights from Louisville to St. Louis

Our best Delta deals on Louisville to St. Louis flight tickets
Delta
Aug 27
SDF12:45 pmLouisville Intl
4h 21m
1 stop
STL4:06 pmLambert-St Louis
Sep 3
STL5:30 pmLambert-St Louis
4h 30m
1 stop
SDF11:00 pmLouisville Intl
$197
Find similar
Delta
Sep 5
SDF6:00 amLouisville Intl
4h 15m
1 stop
STL9:15 amLambert-St Louis
Sep 6
STL7:00 amLambert-St Louis
3h 45m
1 stop
SDF11:45 amLouisville Intl
$242
Find similar
Delta
Sep 5
SDF10:45 amLouisville Intl
6h 21m
1 stop
STL4:06 pmLambert-St Louis
Sep 6
STL3:36 pmLambert-St Louis
6h 10m
1 stop
SDF10:46 pmLouisville Intl
$267
Find similar

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 July 31, 2025.
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

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/16

6:00 am-9:16 am

1 stop4h 16m

Lambert-St Louis

Sat 9/20

6:10 am-2:03 pm

1 stop6h 53m

$187

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 9/16

1:16 pm-8:32 pm

2 stops8h 16m

Lambert-St Louis

Sat 9/20

6:10 am-5:38 pm

1 stop10h 28m

$192

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 8/27

12:45 pm-4:06 pm

1 stop4h 21m

Lambert-St Louis

Wed 9/3

5:30 pm-11:00 pm

1 stop4h 30m

$197

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 9/5

6:00 am-9:15 am

1 stop4h 15m

Lambert-St Louis

Sat 9/6

7:00 am-11:45 am

1 stop3h 45m

$242

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 10/15

8:40 pm-9:40 am

1 stop14h 00m

Lambert-St Louis

Sun 10/19

10:35 am-7:35 pm

1 stop8h 00m

$256

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 9/20

5:50 am-11:30 am

2 stops6h 40m

Lambert-St Louis

Mon 9/22

2:45 pm-11:30 pm

2 stops7h 45m

$275

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 9/10

7:15 am-1:10 pm

2 stops6h 55m

Lambert-St Louis

Fri 9/12

7:50 am-4:45 pm

2 stops7h 55m

$296

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 9/4

10:14 am-12:00 pm

3 stops26h 46m

Lambert-St Louis

Sun 9/7

10:35 am-10:28 pm

1 stop10h 53m

$341

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 8/16

7:58 pm-9:40 am

1 stop14h 42m

Lambert-St Louis

Sun 8/17

2:30 pm-6:53 pm

3 stops27h 23m

$355

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Sat 9/13

10:14 am-9:40 am

2 stops24h 26m

Lambert-St Louis

Sun 9/14

12:05 pm-10:27 am

3 stops21h 22m

$361

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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $297. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $475. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Louisville in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $304 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $344 per ticket.

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 are 1 cabin classes 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

Best Price Found

$99

Fastest flight time

3h 44m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Louisville in the past 72 hours is $99. The best round-trip flight deal from Louisville to St. Louis found on momondo in the last 72 hours is $187.
The fastest flight from Louisville to St. Louis takes 3h 44m
There are no direct flights from Louisville to St. Louis. Popular non-direct route for this connection is Louisville Intl Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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 44m 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 many operators does momondo search for flights from Louisville Intl Airport to Lambert-St Louis Airport?

  • 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.

  • What is the most popular airline from Louisville to St. Louis?

Best airlines flying from Louisville to St. Louis

Compare and see reviews for airlines that fly from Louisville to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $204Free CancellationRating
8.0
7,981 reviews
Search Delta flights

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
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
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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