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 South Bend and flying into St. Louis (one of the most popular routes), then the duration is 3h 24m on average. Another popular route from Indiana to St. Louis is flying from Indianapolis to St. Louis, which will take roughly 4h 07m. Keep in mind that layovers or delays could extend your travel time.

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 38% 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.

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

Southwest, United Airlines, and American Airlines 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?

323 flights are operational weekly from Indiana to St. Louis as of August 2025. The most popular departure day for this route is Sat, with 23% of flights per week taking off on this day.

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 August 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.

$39 Cheap Flights from Indiana to St. Louis in 2025

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Find the cheapest flights from Indiana to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

11:45 am - 12:55 pmMDW-STL

1h 10mnonstop

7:20 pm - 8:25 pmSTL-MDW

1h 05mnonstop

$77Southwest

Find Deal

Thu, Sep 4 - Mon, Sep 8

4:55 pm - 6:23 pmORD-STL

1h 28mnonstop

9:17 am - 10:47 amSTL-ORD

1h 30mnonstop

$77United Airlines

Find Deal

Thu, Sep 4 - Sat, Sep 13

2:29 pm - 3:52 pmORD-STL

1h 23mnonstop

6:05 am - 7:25 amSTL-ORD

1h 20mnonstop

$91American Airlines

Find Deal

Thu, Sep 4 - Mon, Sep 8

2:29 pm - 3:52 pmORD-STL

1h 23mnonstop

6:05 am - 7:25 amSTL-ORD

1h 20mnonstop

$93American Airlines

Find Deal

Thu, Sep 4 - Mon, Sep 8

12:55 pm - 2:19 pmORD-STL

1h 24mnonstop

1:00 pm - 4:19 pmSTL-ORD

3h 19m1 stop

$132Southern / Mokulele

Find Deal

Thu, Sep 4 - Mon, Sep 8

6:20 am - 3:04 pmMDW-STL

8h 44m1 stop

4:00 pm - 11:20 pmSTL-MDW

7h 20m1 stop

$144Frontier

Find Deal

Thu, Sep 11 - Thu, Sep 18

5:10 am - 3:04 pmORD-STL

9h 54m1 stop

4:00 pm - 12:10 amSTL-ORD

8h 10m1 stop

$144Frontier

Find Deal

Thu, Sep 4 - Mon, Sep 8

8:15 am - 12:00 pmORD-STL

3h 45m1 stop

9:20 am - 7:24 amSTL-ORD

22h 04m1 stop

$163Southern / Mokulele

Find Deal

Thu, Sep 18 - Tue, Oct 7

10:35 am - 4:05 pmMDW-STL

5h 30m1 stop

2:15 pm - 6:35 pmSTL-MDW

4h 20m1 stop

$177Delta

Find Deal

Wed, Sep 24 - Wed, Oct 1

5:30 am - 9:59 amORD-STL

4h 29m1 stop

6:42 pm - 11:54 pmSTL-ORD

5h 12m1 stop

$177Delta

Find Deal

Wed, Sep 24 - Mon, Sep 29

Southwest flights from Indiana to St. Louis

Our best Southwest deals on Indiana to St. Louis flight tickets

Southwest

Sep 4

MDW11:45 amChicago Midway

1h 10m

STL12:55 pmLambert-St Louis

Sep 8

STL7:20 pmLambert-St Louis

1h 05m

MDW8:25 pmChicago Midway

$77

Find similar

Southwest

Sep 4

MDW5:25 amChicago Midway

5h 25m

1 stop

STL10:50 amLambert-St Louis

Sep 8

STL7:20 amLambert-St Louis

1h 10m

MDW8:30 amChicago Midway

$87

Find similar

Southwest

Sep 25

MDW7:30 amChicago Midway

1h 10m

STL8:40 amLambert-St Louis

Sep 27

STL10:30 amLambert-St Louis

6h 10m

2 stops

MDW4:40 pmChicago Midway

$92

Find similar

United Airlines flights from Indiana to St. Louis

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

United Airlines

Sep 4

ORD4:55 pmChicago O'Hare Intl

1h 28m

STL6:23 pmLambert-St Louis

Sep 13

STL9:17 amLambert-St Louis

1h 30m

ORD10:47 amChicago O'Hare Intl

$77

Find similar

United Airlines

Sep 26

ORD2:20 pmChicago O'Hare Intl

1h 24m

STL3:44 pmLambert-St Louis

Sep 27

STL8:00 amLambert-St Louis

1h 30m

ORD9:30 amChicago O'Hare Intl

$114

Find similar

United Airlines

Sep 24

ORD12:55 pmChicago O'Hare Intl

1h 24m

STL2:19 pmLambert-St Louis

Sep 27

STL6:30 amLambert-St Louis

1h 30m

ORD8:00 amChicago O'Hare Intl

$137

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 9/4

11:45 am-12:55 pm

Nonstop1h 10m

Lambert-St Louis

Mon 9/8

7:20 pm-8:25 pm

Nonstop1h 05m

$77

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/4

4:55 pm-6:23 pm

Nonstop1h 28m

Lambert-St Louis

Sat 9/13

9:17 am-10:47 am

Nonstop1h 30m

$77

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/4

2:29 pm-3:52 pm

Nonstop1h 23m

Lambert-St Louis

Mon 9/8

6:05 am-7:25 am

Nonstop1h 20m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/4

2:29 pm-3:52 pm

Nonstop1h 23m

Lambert-St Louis

Mon 9/8

6:05 am-7:25 am

Nonstop1h 20m

$93

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/4

12:55 pm-2:19 pm

Nonstop1h 24m

Lambert-St Louis

Mon 9/8

1:00 pm-4:19 pm

1 stop3h 19m

$132

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 9/11

6:20 am-3:04 pm

1 stop8h 44m

Lambert-St Louis

Thu 9/18

4:00 pm-11:20 pm

1 stop7h 20m

$144

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/4

5:10 am-3:04 pm

1 stop9h 54m

Lambert-St Louis

Mon 9/8

4:00 pm-12:10 am

1 stop8h 10m

$144

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/18

8:15 am-12:00 pm

1 stop3h 45m

Lambert-St Louis

Tue 10/7

9:20 am-7:24 am

1 stop22h 04m

$163

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 9/24

10:35 am-4:05 pm

1 stop5h 30m

Lambert-St Louis

Wed 10/1

2:15 pm-6:35 pm

1 stop4h 20m

$177

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 9/24

5:30 am-9:59 am

1 stop4h 29m

Lambert-St Louis

Mon 9/29

6:42 pm-11:54 pm

1 stop5h 12m

$177

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 $276. 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

Best Price Found	$39
Fastest flight time	1h 10m
Direct flights	Every day
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from Indiana in the past 72 hours is $39. The best round-trip flight deal from Indiana to St. Louis found on momondo in the last 72 hours is $77.

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 near St. Louis: 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 August 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 $198	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $213	Free Cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights
Delta	PriceFrom $218	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights

St. Charles

Chesterfield

Fairview Heights

Hermann

Maryland Heights

Florissant

O'Fallon

Fenton

Wentzville

Collinsville

Alton

St. Peters

Farmington

Festus

Glencoe

Eureka

Clayton

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.