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Cheap flights from Indianapolis to St. Louis from $71

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 5/20. 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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Find the cheapest flights from Indianapolis to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:14 pm - 12:21 am
IND
-
STL
13h 07m
2 stops
Frontier Logo
6:33 pm - 11:03 am
STL
-
IND
15h 30m
1 stop
$258Frontier
dv., maig 8 - dt., maig 12
Multiple Airlines Logo
12:26 pm - 4:15 pm
IND
-
STL
28h 49m
2 stops
Multiple Airlines Logo
4:17 pm - 6:43 pm
STL
-
IND
25h 26m
1 stop
$263Multiple Airlines
dc., maig 20 - dc., juny 24
United Airlines Logo
11:10 am - 3:46 pm
IND
-
STL
5h 36m
1 stop
United Airlines Logo
5:29 pm - 10:05 pm
STL
-
IND
3h 36m
1 stop
$265United Airlines
ds., maig 23 - ds., maig 30
Multiple Airlines Logo
12:26 pm - 4:15 pm
IND
-
STL
28h 49m
2 stops
Multiple Airlines Logo
6:33 pm - 11:23 am
STL
-
IND
15h 50m
1 stop
$266Multiple Airlines
dc., maig 20 - dg., maig 24
Southwest Logo
6:35 am - 10:30 am
IND
-
STL
4h 55m
1 stop
Southwest Logo
2:05 pm - 9:00 pm
STL
-
IND
5h 55m
2 stops
$271Southwest
ds., maig 23 - ds., maig 30
United Airlines Logo
9:28 am - 12:47 pm
IND
-
STL
4h 19m
1 stop
United Airlines Logo
6:00 am - 10:28 am
STL
-
IND
3h 28m
1 stop
$275United Airlines
dc., maig 20 - dc., juny 24
Multiple Airlines Logo
12:07 pm - 6:50 am
IND
-
STL
19h 43m
2 stops
Multiple Airlines Logo
6:33 pm - 11:03 am
STL
-
IND
15h 30m
1 stop
$278Multiple Airlines
dv., maig 1 - dt., maig 12
Southwest Logo
12:45 pm - 6:25 pm
IND
-
STL
6h 40m
2 stops
Southwest Logo
2:20 pm - 11:35 pm
STL
-
IND
8h 15m
1 stop
$298Southwest
dt., juny 9 - dc., juny 10
Frontier Logo
12:14 pm - 8:55 am
IND
-
STL
21h 41m
1 stop
Frontier Logo
6:33 pm - 11:03 am
STL
-
IND
15h 30m
1 stop
$300Frontier
dv., maig 8 - dt., maig 12
United Airlines Logo
6:20 pm - 9:18 pm
IND
-
STL
3h 58m
1 stop
United Airlines Logo
8:00 am - 12:54 pm
STL
-
IND
3h 54m
1 stop
$306United Airlines
dc., maig 20 - dg., maig 24

United Airlines flights from Indianapolis to St. Louis

Our best United Airlines deals on Indianapolis to St. Louis flight tickets
United Airlines
May 23
IND11:10 amIndianapolis
5h 36m
1 stop
STL3:46 pmLambert-St Louis
May 30
STL5:29 pmLambert-St Louis
3h 36m
1 stop
IND10:05 pmIndianapolis
$265
United Airlines
May 20
IND9:28 amIndianapolis
4h 19m
1 stop
STL12:47 pmLambert-St Louis
Jun 24
STL6:00 amLambert-St Louis
3h 28m
1 stop
IND10:28 amIndianapolis
$275
United Airlines
May 20
IND6:20 pmIndianapolis
3h 58m
1 stop
STL9:18 pmLambert-St Louis
May 24
STL8:00 amLambert-St Louis
3h 54m
1 stop
IND12:54 pmIndianapolis
$306

Southwest flights from Indianapolis to St. Louis

Our best Southwest deals on Indianapolis to St. Louis flight tickets
Southwest
May 23
IND6:35 amIndianapolis
4h 55m
1 stop
STL10:30 amLambert-St Louis
May 30
STL2:05 pmLambert-St Louis
5h 55m
2 stops
IND9:00 pmIndianapolis
$271
Southwest
Jun 9
IND12:45 pmIndianapolis
6h 40m
2 stops
STL6:25 pmLambert-St Louis
Jun 10
STL2:20 pmLambert-St Louis
8h 15m
1 stop
IND11:35 pmIndianapolis
$298
Southwest
Jun 12
IND8:20 pmIndianapolis
5h 20m
1 stop
STL12:40 amLambert-St Louis
Jun 17
STL3:15 pmLambert-St Louis
6h 55m
2 stops
IND11:10 pmIndianapolis
$311

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 abril 28, 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

dv. 5/8

12:14 pm-12:21 am

2 stops13h 07m

Lambert-St Louis

dt. 5/12

6:33 pm-11:03 am

1 stop15h 30m

$258

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

dc. 5/20

12:26 pm-4:15 pm

2 stops28h 49m

Lambert-St Louis

dc. 6/24

4:17 pm-6:43 pm

1 stop25h 26m

$263

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

ds. 5/23

11:10 am-3:46 pm

1 stop5h 36m

Lambert-St Louis

ds. 5/30

5:29 pm-10:05 pm

1 stop3h 36m

$265

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

dc. 5/20

12:26 pm-4:15 pm

2 stops28h 49m

Lambert-St Louis

dg. 5/24

6:33 pm-11:23 am

1 stop15h 50m

$266

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

ds. 5/23

6:35 am-10:30 am

1 stop4h 55m

Lambert-St Louis

ds. 5/30

2:05 pm-9:00 pm

2 stops5h 55m

$271
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

dc. 5/20

9:28 am-12:47 pm

1 stop4h 19m

Lambert-St Louis

dc. 6/24

6:00 am-10:28 am

1 stop3h 28m

$275

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

dv. 5/1

12:07 pm-6:50 am

2 stops19h 43m

Lambert-St Louis

dt. 5/12

6:33 pm-11:03 am

1 stop15h 30m

$278

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

dt. 6/9

12:45 pm-6:25 pm

2 stops6h 40m

Lambert-St Louis

dc. 6/10

2:20 pm-11:35 pm

1 stop8h 15m

$298

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

dv. 5/8

12:14 pm-8:55 am

1 stop21h 41m

Lambert-St Louis

dt. 5/12

6:33 pm-11:03 am

1 stop15h 30m

$300

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

dc. 5/20

6:20 pm-9:18 pm

1 stop3h 58m

Lambert-St Louis

dg. 5/24

8:00 am-12:54 pm

1 stop3h 54m

$306

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 typical price of a round-trip flight between Indianapolis and St. Louis?

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 April 2026, prices for Indianapolis to St. Louis flights are approximately 46% 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 51m

Direct flights

None
The fastest flight from Indianapolis to St. Louis takes 3h 51m
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 51m 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
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

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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