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 39% 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 35m on average. Another popular route from Indiana to St. Louis is flying from Indianapolis to St. Louis, which will take roughly 3h 55m. Keep in mind that layovers or delays could extend your travel time.

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

Frontier, Southwest, and United 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?

479 flights are operational weekly from Indiana to St. Louis as of October 2025. The most popular departure day for this route is Mon, with 15% 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 October 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.

$54 Cheap Flights from Indiana to St. Louis in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

5:01 am - 10:12 amORD-STL

5h 11m1 stop

6:22 pm - 12:59 amSTL-ORD

6h 37m1 stop

$108Frontier

Find Deal

Thu, Nov 6 - Thu, Nov 13

6:20 am - 7:35 amMDW-STL

1h 15mnonstop

5:45 pm - 6:55 pmSTL-MDW

1h 10mnonstop

$131Southwest

Find Deal

Thu, Nov 20 - Mon, Nov 24

6:44 am - 8:09 amORD-STL

1h 25mnonstop

4:46 pm - 6:21 pmSTL-ORD

1h 35mnonstop

$132American Airlines

Find Deal

Thu, Nov 20 - Mon, Nov 24

9:23 pm - 10:45 pmORD-STL

1h 22mnonstop

12:31 pm - 2:00 pmSTL-ORD

1h 29mnonstop

$164United Airlines

Find Deal

Fri, Oct 31 - Sat, Nov 1

11:05 am - 12:28 pmORD-STL

1h 23mnonstop

6:43 pm - 8:13 pmSTL-ORD

1h 30mnonstop

$171United Airlines

Find Deal

Sat, Nov 8 - Sat, Nov 15

3:23 pm - 4:47 pmORD-STL

1h 24mnonstop

8:39 am - 10:17 amSTL-ORD

1h 38mnonstop

$172American Airlines

Find Deal

Tue, Nov 11 - Thu, Nov 13

5:59 pm - 10:16 pmMDW-STL

4h 17m1 stop

10:00 am - 4:25 pmSTL-MDW

6h 25m1 stop

$184Delta

Find Deal

Wed, Dec 24 - Sat, Jan 10

8:55 am - 1:51 pmORD-STL

4h 56m1 stop

6:00 am - 10:19 amSTL-ORD

4h 19m1 stop

$184Delta

Find Deal

Thu, Nov 20 - Mon, Nov 24

6:05 pm - 9:07 amORD-STL

15h 02m1 stop

11:07 am - 12:27 amSTL-ORD

13h 20m2 stops

$188Multiple Airlines

Find Deal

Tue, Nov 11 - Thu, Nov 13

6:24 pm - 5:31 pmORD-STL

23h 07m1 stop

12:20 pm - 9:00 pmSTL-ORD

8h 40m1 stop

$207Multiple Airlines

Find Deal

Thu, Dec 4 - Sun, Jan 25

Frontier flights from Indiana to St. Louis

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

Frontier

Nov 6

ORD5:01 amChicago O'Hare Intl

5h 11m

1 stop

STL10:12 amLambert-St Louis

Nov 13

STL6:22 pmLambert-St Louis

6h 37m

1 stop

ORD12:59 amChicago O'Hare Intl

$108

Find similar

Frontier

Oct 29

CVG12:30 pmCincinnati Cinci./N. Kentucky

22h 42m

1 stop

STL10:12 amLambert-St Louis

Oct 31

STL4:52 pmLambert-St Louis

22h 41m

1 stop

CVG4:33 pmCincinnati Cinci./N. Kentucky

$138

Find similar

Frontier

Nov 8

IND7:05 pmIndianapolis

15h 02m

1 stop

STL9:07 amLambert-St Louis

Nov 10

STL2:12 pmLambert-St Louis

6h 07m

1 stop

IND9:19 pmIndianapolis

$140

Find similar

Southwest flights from Indiana to St. Louis

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

Southwest

Nov 20

MDW6:20 amChicago Midway

1h 15m

STL7:35 amLambert-St Louis

Nov 24

STL5:45 pmLambert-St Louis

1h 10m

MDW6:55 pmChicago Midway

$131

Find similar

Southwest

Nov 20

MDW6:20 amChicago Midway

1h 15m

STL7:35 amLambert-St Louis

Nov 24

STL8:00 amLambert-St Louis

4h 35m

1 stop

MDW12:35 pmChicago Midway

$141

Find similar

Southwest

Dec 24

MDW8:25 amChicago Midway

1h 15m

STL9:40 amLambert-St Louis

Jan 10

STL7:00 amLambert-St Louis

9h 25m

2 stops

MDW4:25 pmChicago Midway

$146

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 11/6

5:01 am-10:12 am

1 stop5h 11m

Lambert-St Louis

Thu 11/13

6:22 pm-12:59 am

1 stop6h 37m

$108

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 11/20

6:20 am-7:35 am

Nonstop1h 15m

Lambert-St Louis

Mon 11/24

5:45 pm-6:55 pm

Nonstop1h 10m

$131

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 11/20

6:44 am-8:09 am

Nonstop1h 25m

Lambert-St Louis

Mon 11/24

4:46 pm-6:21 pm

Nonstop1h 35m

$132

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 10/31

9:23 pm-10:45 pm

Nonstop1h 22m

Lambert-St Louis

Sat 11/1

12:31 pm-2:00 pm

Nonstop1h 29m

$164

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 11/8

11:05 am-12:28 pm

Nonstop1h 23m

Lambert-St Louis

Sat 11/15

6:43 pm-8:13 pm

Nonstop1h 30m

$171

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 11/11

3:23 pm-4:47 pm

Nonstop1h 24m

Lambert-St Louis

Thu 11/13

8:39 am-10:17 am

Nonstop1h 38m

$172

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 12/24

5:59 pm-10:16 pm

1 stop4h 17m

Lambert-St Louis

Sat 1/10

10:00 am-4:25 pm

1 stop6h 25m

$184

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 11/20

8:55 am-1:51 pm

1 stop4h 56m

Lambert-St Louis

Mon 11/24

6:00 am-10:19 am

1 stop4h 19m

$184

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 11/11

6:05 pm-9:07 am

1 stop15h 02m

Lambert-St Louis

Thu 11/13

11:07 am-12:27 am

2 stops13h 20m

$188

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 12/4

6:24 pm-5:31 pm

1 stop23h 07m

Lambert-St Louis

Sun 1/25

12:20 pm-9:00 pm

1 stop8h 40m

$207

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 $266. 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 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 October 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 11,045 reviews	Search American Airlines flights
United Airlines	PriceFrom $213	Free Cancellation	Rating 7.4 8,974 reviews	Search United Airlines flights
Delta	PriceFrom $218	Free Cancellation	Rating 7.9 7,973 reviews	Search Delta flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Wentzville

Collinsville

Fenton

St. Peters

Alton

Farmington

Festus

Glencoe

Clayton

Edwardsville

Eureka

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.