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Cheap flights from Indianapolis to St. Louis from $89

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Indianapolis to St. Louis departing on 7/24. 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 Indianapolis to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:11 pm - 5:22 pm
IND
-
STL
24h 11m
1 stop
Frontier Logo
6:17 pm - 5:26 pm
STL
-
IND
22h 09m
1 stop
$170Frontier
Wed, Aug 19 - Sun, Aug 23
Frontier Logo
6:11 pm - 5:22 pm
IND
-
STL
24h 11m
1 stop
Frontier Logo
6:17 pm - 5:26 pm
STL
-
IND
22h 09m
1 stop
$171Frontier
Wed, Aug 19 - Sun, Aug 23
Frontier Logo
7:10 pm - 11:59 pm
IND
-
STL
29h 49m
1 stop
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
$189Frontier
Tue, Jul 28 - Tue, Aug 4
Frontier Logo
12:20 pm - 8:57 am
IND
-
STL
21h 37m
1 stop
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
$207Frontier
Fri, Jul 10 - Tue, Jul 14
Frontier Logo
7:33 pm - 5:22 pm
IND
-
STL
22h 49m
2 stops
Frontier Logo
6:17 pm - 5:26 pm
STL
-
IND
22h 09m
1 stop
$212Frontier
Wed, Aug 19 - Sun, Aug 23
Frontier Logo
6:11 pm - 5:22 pm
IND
-
STL
24h 11m
1 stop
Frontier Logo
6:17 pm - 11:17 am
STL
-
IND
16h 00m
2 stops
$226Frontier
Wed, Aug 19 - Sun, Aug 23
Frontier Logo
6:11 pm - 5:22 pm
IND
-
STL
24h 11m
1 stop
Frontier Logo
6:17 pm - 11:17 am
STL
-
IND
16h 00m
2 stops
$228Frontier
Wed, Aug 19 - Sun, Aug 23
American Airlines Logo
7:51 pm - 12:16 am
IND
-
STL
5h 25m
1 stop
American Airlines Logo
1:20 pm - 8:16 pm
STL
-
IND
5h 56m
1 stop
$233American Airlines
Tue, Jul 21 - Sat, Jul 25
American Airlines Logo
5:04 am - 8:24 am
IND
-
STL
4h 20m
1 stop
American Airlines Logo
6:00 am - 11:32 am
STL
-
IND
4h 32m
1 stop
$235American Airlines
Sat, Aug 8 - Mon, Aug 10
American Airlines Logo
5:04 am - 8:24 am
IND
-
STL
4h 20m
1 stop
American Airlines Logo
6:00 am - 11:32 am
STL
-
IND
4h 32m
1 stop
$236American Airlines
Sat, Aug 8 - Mon, Aug 10

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American Airlines flights from Indianapolis to St. Louis

Our best American Airlines deals on Indianapolis to St. Louis flight tickets
American Airlines
Jul 21
IND7:51 pmIndianapolis
5h 25m
1 stop
STL12:16 amLambert-St Louis
Jul 25
STL1:20 pmLambert-St Louis
5h 56m
1 stop
IND8:16 pmIndianapolis
$233
American Airlines
Aug 8
IND5:04 amIndianapolis
4h 20m
1 stop
STL8:24 amLambert-St Louis
Aug 10
STL6:00 amLambert-St Louis
4h 32m
1 stop
IND11:32 amIndianapolis
$236

Southwest flights from Indianapolis to St. Louis

Our best Southwest deals on Indianapolis to St. Louis flight tickets
Southwest
Sep 24
IND5:00 pmIndianapolis
6h 05m
1 stop
STL10:05 pmLambert-St Louis
Sep 26
STL8:25 amLambert-St Louis
7h 10m
1 stop
IND4:35 pmIndianapolis
$235
Southwest
Jul 21
IND1:05 pmIndianapolis
7h 00m
2 stops
STL7:05 pmLambert-St Louis
Jul 25
STL5:40 amLambert-St Louis
5h 40m
1 stop
IND12:20 pmIndianapolis
$238
Southwest
Sep 24
IND10:20 amIndianapolis
3h 55m
1 stop
STL1:15 pmLambert-St Louis
Sep 26
STL5:45 amLambert-St Louis
6h 40m
2 stops
IND1:25 pmIndianapolis
$240

momondo Fare Finder

 
Customize your flight search to find flights from Indianapolis 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 29, 2026.
Use the filters below to find and compare flights from Indianapolis to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/19

6:11 pm-5:22 pm

1 stop24h 11m

Lambert-St Louis

Sun 8/23

6:17 pm-5:26 pm

1 stop22h 09m

$170

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/19

6:11 pm-5:22 pm

1 stop24h 11m

Lambert-St Louis

Sun 8/23

6:17 pm-5:26 pm

1 stop22h 09m

$171

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 7/28

7:10 pm-11:59 pm

1 stop29h 49m

Lambert-St Louis

Tue 8/4

6:34 pm-11:25 am

1 stop15h 51m

$189

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 7/10

12:20 pm-8:57 am

1 stop21h 37m

Lambert-St Louis

Tue 7/14

6:34 pm-11:25 am

1 stop15h 51m

$207

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/19

7:33 pm-5:22 pm

2 stops22h 49m

Lambert-St Louis

Sun 8/23

6:17 pm-5:26 pm

1 stop22h 09m

$212

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/19

6:11 pm-5:22 pm

1 stop24h 11m

Lambert-St Louis

Sun 8/23

6:17 pm-11:17 am

2 stops16h 00m

$226

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/19

6:11 pm-5:22 pm

1 stop24h 11m

Lambert-St Louis

Sun 8/23

6:17 pm-11:17 am

2 stops16h 00m

$228

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 7/21

7:51 pm-12:16 am

1 stop5h 25m

Lambert-St Louis

Sat 7/25

1:20 pm-8:16 pm

1 stop5h 56m

$233
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 8/8

5:04 am-8:24 am

1 stop4h 20m

Lambert-St Louis

Mon 8/10

6:00 am-11:32 am

1 stop4h 32m

$235

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 8/8

5:04 am-8:24 am

1 stop4h 20m

Lambert-St Louis

Mon 8/10

6:00 am-11:32 am

1 stop4h 32m

$236

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 Indianapolis 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 month to fly to St. Louis?

In general, August is the cheapest month to fly from Indianapolis to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of November is another great option to travel to St. Louis, with average flight prices from Indianapolis averaging around $256.

What is the cheapest Indianapolis to Lambert-St Louis flight route?

Fly from Indianapolis to Lambert-St Louis for the best Indianapolis - Lambert-St Louis flight prices

What cabin class options are available on Indianapolis to St. Louis flights?

There is only 1 cabin class available to choose from on Indianapolis to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Indianapolis to St. Louis flight prices changed over time?

As of June 2026, prices for Indianapolis to St. Louis flights are approximately 75% more expensive when compared to flights at the same time last year.

When to book flights from Indianapolis to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Indianapolis to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Indianapolis to St. Louis (IND to STL) flight deals and tips

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

Fastest flight time

3h 53m

Direct flights

None
The fastest flight from Indianapolis to St. Louis takes 3h 53m
There are no direct flights from Indianapolis to St. Louis. There are no popular flight routes from Indianapolis to St. Louis.
Search flight deals

Frequently asked questions about flying from Indianapolis to St. Louis

  • How far is Indianapolis to Lambert-St Louis by plane?

    The distance between Indianapolis and Lambert-St Louis is about 230.0 mi. Typically, this will take 3h 53m by plane in normal conditions.

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

    Prices for flights from Indianapolis Airport to Lambert-St Louis Airport were last updated today.

  • How old do you have to be to fly from Indianapolis Airport 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 Indianapolis Airport to Lambert-St Louis Airport.

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

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Indianapolis to St. Louis?

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
Collinsville
St. Peters
Alton
Wentzville
Farmington
Fenton
Clayton
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

Why use momondo?

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

It is quick and easy to find Indianapolis to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Indianapolis with this policy.

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

momondo helps you find the best flight between Indianapolis and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

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

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