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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 5/8. 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 - 8:55 am
IND
-
STL
21h 41m
1 stop
Frontier Logo
6:31 pm - 11:19 am
STL
-
IND
15h 48m
1 stop
$155Frontier
Fri, Jun 5 - Tue, Jun 9
Frontier Logo
12:17 pm - 6:50 am
IND
-
STL
19h 33m
1 stop
Frontier Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
$195Frontier
Thu, Apr 30 - Sat, May 2
Frontier Logo
12:17 pm - 6:50 am
IND
-
STL
19h 33m
1 stop
Frontier Logo
8:17 pm - 5:16 pm
STL
-
IND
19h 59m
2 stops
$212Frontier
Thu, Apr 30 - Sat, May 2
Multiple Airlines Logo
12:14 pm - 12:21 am
IND
-
STL
13h 07m
2 stops
Multiple Airlines Logo
4:19 pm - 10:41 pm
STL
-
IND
29h 22m
1 stop
$216Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
12:17 pm - 6:50 am
IND
-
STL
19h 33m
1 stop
Multiple Airlines Logo
4:59 pm - 10:34 am
STL
-
IND
16h 35m
2 stops
$217Multiple Airlines
Thu, Apr 30 - Sun, May 3
Multiple Airlines Logo
12:14 pm - 8:55 am
IND
-
STL
21h 41m
1 stop
Multiple Airlines Logo
4:19 pm - 7:41 pm
STL
-
IND
26h 22m
2 stops
$219Multiple Airlines
Fri, May 8 - Fri, May 15
Multiple Airlines Logo
12:26 pm - 8:55 am
IND
-
STL
21h 29m
2 stops
Multiple Airlines Logo
6:31 pm - 11:19 am
STL
-
IND
15h 48m
1 stop
$224Multiple Airlines
Fri, Jun 5 - Tue, Jun 9
Multiple Airlines Logo
6:10 am - 12:21 am
IND
-
STL
19h 11m
1 stop
Multiple Airlines Logo
5:27 pm - 11:21 am
STL
-
IND
16h 54m
2 stops
$226Multiple Airlines
Mon, May 18 - Wed, May 20
Frontier Logo
3:00 pm - 11:19 pm
IND
-
STL
9h 19m
1 stop
Frontier Logo
4:59 pm - 11:11 am
STL
-
IND
17h 12m
1 stop
$231Frontier
Fri, Apr 24 - Tue, Apr 28
Frontier Logo
12:14 pm - 8:55 am
IND
-
STL
21h 41m
1 stop
Frontier Logo
6:55 pm - 11:23 am
STL
-
IND
15h 28m
1 stop
$232Frontier
Fri, May 15 - Sun, May 17

Delta flights from Indianapolis to St. Louis

Our best Delta deals on Indianapolis to St. Louis flight tickets
Delta
May 14
IND7:54 pmIndianapolis
4h 27m
1 stop
STL11:21 pmLambert-St Louis
May 16
STL6:45 amLambert-St Louis
5h 42m
1 stop
IND1:27 pmIndianapolis
$287
Delta
Jun 18
IND11:23 amIndianapolis
5h 54m
1 stop
STL4:17 pmLambert-St Louis
Jun 21
STL1:59 pmLambert-St Louis
3h 49m
1 stop
IND6:48 pmIndianapolis
$337

United Airlines flights from Indianapolis to St. Louis

Our best United Airlines deals on Indianapolis to St. Louis flight tickets
United Airlines
Apr 30
IND7:15 amIndianapolis
6h 26m
1 stop
STL12:41 pmLambert-St Louis
May 4
STL7:09 pmLambert-St Louis
4h 50m
1 stop
IND12:59 amIndianapolis
$369
United Airlines
Apr 30
IND10:46 amIndianapolis
6h 53m
1 stop
STL4:39 pmLambert-St Louis
May 4
STL5:28 pmLambert-St Louis
6h 31m
1 stop
IND12:59 amIndianapolis
$434
United Airlines
Apr 23
IND7:15 amIndianapolis
6h 07m
1 stop
STL12:22 pmLambert-St Louis
Apr 27
STL9:10 amLambert-St Louis
4h 58m
1 stop
IND3:08 pmIndianapolis
$499

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 April 13, 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

Fri 6/5

12:14 pm-8:55 am

1 stop21h 41m

Lambert-St Louis

Tue 6/9

6:31 pm-11:19 am

1 stop15h 48m

$155

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/30

12:17 pm-6:50 am

1 stop19h 33m

Lambert-St Louis

Sat 5/2

8:23 pm-11:17 am

1 stop13h 54m

$195

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/30

12:17 pm-6:50 am

1 stop19h 33m

Lambert-St Louis

Sat 5/2

8:17 pm-5:16 pm

2 stops19h 59m

$212

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 5/11

12:14 pm-12:21 am

2 stops13h 07m

Lambert-St Louis

Mon 5/18

4:19 pm-10:41 pm

1 stop29h 22m

$216

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/30

12:17 pm-6:50 am

1 stop19h 33m

Lambert-St Louis

Sun 5/3

4:59 pm-10:34 am

2 stops16h 35m

$217

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 5/8

12:14 pm-8:55 am

1 stop21h 41m

Lambert-St Louis

Fri 5/15

4:19 pm-7:41 pm

2 stops26h 22m

$219

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 6/5

12:26 pm-8:55 am

2 stops21h 29m

Lambert-St Louis

Tue 6/9

6:31 pm-11:19 am

1 stop15h 48m

$224

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 5/18

6:10 am-12:21 am

1 stop19h 11m

Lambert-St Louis

Wed 5/20

5:27 pm-11:21 am

2 stops16h 54m

$226
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/24

3:00 pm-11:19 pm

1 stop9h 19m

Lambert-St Louis

Tue 4/28

4:59 pm-11:11 am

1 stop17h 12m

$231

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 5/15

12:14 pm-8:55 am

1 stop21h 41m

Lambert-St Louis

Sun 5/17

6:55 pm-11:23 am

1 stop15h 28m

$232

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 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 Lambert-St Louis flights?

There is only 1 cabin class available to choose from on Indianapolis to Lambert-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 37m

Direct flights

None
The fastest flight from Indianapolis to St. Louis takes 3h 37m
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 37m 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 many operators does momondo search for flights from Indianapolis Airport to Lambert-St Louis Airport?

  • 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?

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

Best airlines flying from Indianapolis to St. Louis

Compare and see reviews for airlines that fly from Indianapolis to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $196Free CancellationRating
7.1
11,565 reviews
Search American Airlines flights

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
Alton
Wentzville
Fenton
Farmington
Clayton
Festus
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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