What is the cheapest airline that flies from Indiana to Lambert-St Louis?

Southwest, United Airlines, and Frontier are the most popular carriers operating from Indiana to Lambert-St Louis

How many flights depart from Indiana to St. Louis on average per week?

133 flights are operational weekly from Indiana to St. Louis as of December 2025. The most popular departure day for this route is Wed, with 46% of flights per week taking off on this day.

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 Indiana according to our data. American Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to St. Louis?

Flight times from Indiana to St. Louis vary, but if you’re flying out of Fort Wayne and flying into St. Louis (one of the most popular routes), then the duration is 3h 43m on average. Another popular route from Indiana to St. Louis is flying from South Bend to St. Louis, which will take roughly 3h 56m. Keep in mind that layovers or delays could extend your travel time.

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

Prices for flights from Indiana to Lambert-St Louis Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Indiana to Lambert-St Louis Airport?

As of December 2025, there are 6 operators available to choose from for flights from Indiana to Lambert-St Louis Airport.

How old do you have to be to fly from Indiana to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Indiana to Lambert-St Louis Airport.

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

The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$63 Cheap Flights from Indiana to St. Louis in 2025/26

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Find the cheapest flights from Indiana to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 am - 2:48 pm

ORD

STL

8h 58m1 stop

5:11 pm - 1:13 pm

STL

ORD

20h 02m1 stop

$139Multiple Airlines

Thu, Jan 8 - Mon, Jan 12

1:20 pm - 6:51 am

ORD

STL

17h 31m1 stop

5:42 pm - 5:52 pm

STL

ORD

24h 10m1 stop

$141Multiple Airlines

Tue, Jan 13 - Tue, Jan 20

8:50 am - 10:20 am

ORD

STL

1h 30mnonstop

11:05 am - 12:34 pm

STL

ORD

1h 29mnonstop

$153American Airlines

Tue, Jan 13 - Tue, Jan 20

9:05 pm - 10:34 pm

CVG

STL

26h 29m1 stop

5:42 pm - 1:00 pm

STL

CVG

18h 18m1 stop

$154Frontier

Mon, Jan 12 - Wed, Jan 21

4:31 pm - 10:34 pm

MDW

STL

30h 03m1 stop

10:16 am - 7:58 pm

STL

MDW

9h 42m1 stop

$158Frontier

Mon, Jan 12 - Mon, Jan 26

9:55 am - 11:15 am

MDW

STL

1h 20mnonstop

5:55 pm - 7:05 pm

STL

MDW

1h 10mnonstop

$171Southwest

Thu, Jan 8 - Mon, Jan 12

8:10 am - 12:45 pm

MDW

STL

4h 35m1 stop

1:10 pm - 2:15 pm

STL

MDW

1h 05mnonstop

$172Southwest

Tue, Jan 20 - Thu, Jan 22

9:50 am - 3:00 pm

MDW

STL

5h 10m1 stop

7:10 am - 11:59 am

STL

MDW

4h 49m1 stop

$173Delta

Tue, Jan 13 - Tue, Jan 20

2:05 pm - 11:36 pm

SBN

STL

10h 31m2 stops

5:29 pm - 10:34 pm

STL

SBN

4h 05m1 stop

$244Delta

Fri, Feb 13 - Mon, Feb 16

5:00 am - 1:36 pm

SDF

STL

9h 36m2 stops

8:01 pm - 12:32 pm

STL

SDF

15h 31m1 stop

$406American Airlines

Thu, Jan 1 - Mon, Jan 5

United Airlines flights from Indiana to St. Louis

Our best United Airlines deals on Indiana to St. Louis flight tickets

United Airlines

Jan 7

ORD7:40 pmChicago O'Hare Intl

1h 33m

STL9:13 pmLambert-St Louis

Jan 8

STL6:30 amLambert-St Louis

1h 35m

ORD8:05 amChicago O'Hare Intl

$171

Find similar

United Airlines

Dec 24

ORD3:00 pmChicago O'Hare Intl

1h 27m

STL4:27 pmLambert-St Louis

Dec 25

STL9:55 amLambert-St Louis

1h 35m

ORD11:30 amChicago O'Hare Intl

$215

Find similar

United Airlines

Feb 20

SBN4:39 pmSouth Bend/Michiana

5h 26m

1 stop

STL9:05 pmLambert-St Louis

Feb 23

STL6:55 pmLambert-St Louis

3h 28m

1 stop

SBN11:23 pmSouth Bend/Michiana

$239

Find similar

American Airlines flights from Indiana to St. Louis

Our best American Airlines deals on Indiana to St. Louis flight tickets

American Airlines

Jan 13

ORD8:50 amChicago O'Hare Intl

1h 30m

STL10:20 amLambert-St Louis

Jan 20

STL11:05 amLambert-St Louis

1h 29m

ORD12:34 pmChicago O'Hare Intl

$153

Find similar

American Airlines

Jan 31

ORD4:42 pmChicago O'Hare Intl

1h 31m

STL6:13 pmLambert-St Louis

Feb 7

STL1:40 pmLambert-St Louis

1h 29m

ORD3:09 pmChicago O'Hare Intl

$172

Find similar

American Airlines

Jan 8

ORD8:50 amChicago O'Hare Intl

1h 30m

STL10:20 amLambert-St Louis

Jan 12

STL6:44 pmLambert-St Louis

1h 31m

ORD8:15 pmChicago O'Hare Intl

$173

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 1/8

5:50 am-2:48 pm

1 stop8h 58m

Lambert-St Louis

Mon 1/12

5:11 pm-1:13 pm

1 stop20h 02m

$139

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 1/13

1:20 pm-6:51 am

1 stop17h 31m

Lambert-St Louis

Tue 1/20

5:42 pm-5:52 pm

1 stop24h 10m

$141

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 1/13

8:50 am-10:20 am

Nonstop1h 30m

Lambert-St Louis

Tue 1/20

11:05 am-12:34 pm

Nonstop1h 29m

$153

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 1/12

9:05 pm-10:34 pm

1 stop26h 29m

Lambert-St Louis

Wed 1/21

5:42 pm-1:00 pm

1 stop18h 18m

$154

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Mon 1/12

4:31 pm-10:34 pm

1 stop30h 03m

Lambert-St Louis

Mon 1/26

10:16 am-7:58 pm

1 stop9h 42m

$158

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 1/8

9:55 am-11:15 am

Nonstop1h 20m

Lambert-St Louis

Mon 1/12

5:55 pm-7:05 pm

Nonstop1h 10m

$171

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 1/20

8:10 am-12:45 pm

1 stop4h 35m

Lambert-St Louis

Thu 1/22

1:10 pm-2:15 pm

Nonstop1h 05m

$172

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 1/13

9:50 am-3:00 pm

1 stop5h 10m

Lambert-St Louis

Tue 1/20

7:10 am-11:59 am

1 stop4h 49m

$173

South BendSt. Louis

SBN - STL

SBNSTL

South Bend/Michiana

Fri 2/13

2:05 pm-11:36 pm

2 stops10h 31m

Lambert-St Louis

Mon 2/16

5:29 pm-10:34 pm

1 stop4h 05m

$244

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 1/1

5:00 am-1:36 pm

2 stops9h 36m

Lambert-St Louis

Mon 1/5

8:01 pm-12:32 pm

1 stop15h 31m

$406

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Indiana 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

Prices

Airlines

Other information

What is the cheapest month to fly to St. Louis?

In general, November is the cheapest month to fly from Indiana to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $256. The month of April is another great option to travel to St. Louis, with average flight prices from Indiana averaging around $289.

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 Tuesday when prices can be found for as low as $265. 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 Monday because tickets tend to average around $392. 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 Indiana in the evening is the least expensive time of day to depart. momondo users have found prices as low as $291 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $345 per ticket.

Cheap Indiana to St. Louis flight deals and tips

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

Fastest flight time	1h 10m
Direct flights	Every day
Airports in St. Louis	1 airport

The fastest flight from Indiana to St. Louis takes 1h 10m

Direct flights go from Indiana to St. Louis every day.

There is 1 airport in St. Louis. From Indiana there are direct flights to Lambert-St Louis (STL).

Search flight deals

When did momondo last update prices for flights from Indiana to Lambert-St Louis Airport?
Prices for flights from Indiana to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Indiana to Lambert-St Louis Airport?
As of December 2025, there are 6 operators available to choose from for flights from Indiana to Lambert-St Louis Airport.
How old do you have to be to fly from Indiana to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Indiana to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Indiana to St. Louis

Compare and see reviews for airlines that fly from Indiana to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $196	Free Cancellation	Rating 7.2 11,054 reviews	Search American Airlines flights
United Airlines	PriceFrom $213	Free Cancellation	Rating 7.4 9,091 reviews	Search United Airlines flights
Delta	PriceFrom $218	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Wentzville

St. Peters

Collinsville

Alton

Clayton

Festus

Glencoe

Farmington

Eureka

Edwardsville

Litchfield

Shrewsbury

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Indiana to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to St. Louis from Indiana on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Indiana.

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

Of course. momondo tracks the price of Indiana to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.