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Cheap flights from Indianapolis to St. Louis from $86

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 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
7:09 pm - 7:51 am
IND
-
STL
13h 42m
1 stop
Frontier Logo
9:55 pm - 12:57 pm
STL
-
IND
14h 02m
1 stop
$171Frontier
Sun, Apr 12 - Thu, Apr 16
Frontier Logo
12:18 pm - 11:25 pm
IND
-
STL
12h 07m
2 stops
Frontier Logo
8:23 pm - 11:32 am
STL
-
IND
14h 09m
1 stop
$185Frontier
Mon, Apr 13 - Wed, Apr 15
Frontier Logo
8:30 pm - 9:48 am
IND
-
STL
14h 18m
1 stop
Frontier Logo
4:59 pm - 11:11 am
STL
-
IND
17h 12m
1 stop
$226Frontier
Fri, Apr 10 - Mon, Apr 13
Frontier Logo
12:34 pm - 11:19 pm
IND
-
STL
11h 45m
2 stops
Frontier Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
$233Frontier
Fri, May 1 - Sat, May 2
Frontier Logo
12:34 pm - 11:19 pm
IND
-
STL
11h 45m
2 stops
Frontier Logo
8:23 pm - 11:17 am
STL
-
IND
13h 54m
1 stop
$239Frontier
Fri, May 1 - Sat, May 2
Frontier Logo
12:17 pm - 6:50 am
IND
-
STL
19h 33m
1 stop
Frontier Logo
4:59 pm - 10:34 am
STL
-
IND
16h 35m
2 stops
$241Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
12:17 pm - 6:50 am
IND
-
STL
19h 33m
1 stop
Frontier Logo
11:16 am - 10:34 am
STL
-
IND
22h 18m
1 stop
$245Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
8:46 pm - 7:21 pm
IND
-
STL
23h 35m
1 stop
Frontier Logo
9:55 pm - 12:57 pm
STL
-
IND
14h 02m
1 stop
$246Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
12:34 pm - 6:50 am
IND
-
STL
19h 16m
1 stop
Frontier Logo
4:59 pm - 10:34 am
STL
-
IND
16h 35m
2 stops
$250Frontier
Fri, Apr 24 - Sun, Apr 26
Frontier Logo
8:30 pm - 9:48 am
IND
-
STL
14h 18m
1 stop
Frontier Logo
8:16 pm - 7:32 pm
STL
-
IND
22h 16m
1 stop
$261Frontier
Fri, Apr 3 - Fri, Apr 10

Frontier flights from Indianapolis to St. Louis

Our best Frontier deals on Indianapolis to St. Louis flight tickets
Frontier
Apr 12
IND7:09 pmIndianapolis
13h 42m
1 stop
STL7:51 amLambert-St Louis
Apr 16
STL9:55 pmLambert-St Louis
14h 02m
1 stop
IND12:57 pmIndianapolis
$171
Frontier
Apr 13
IND12:18 pmIndianapolis
12h 07m
2 stops
STL11:25 pmLambert-St Louis
Apr 15
STL8:23 pmLambert-St Louis
14h 09m
1 stop
IND11:32 amIndianapolis
$185
Frontier
Apr 10
IND8:30 pmIndianapolis
14h 18m
1 stop
STL9:48 amLambert-St Louis
Apr 13
STL4:59 pmLambert-St Louis
17h 12m
1 stop
IND11:11 amIndianapolis
$226

United Airlines flights from Indianapolis to St. Louis

Our best United Airlines deals on Indianapolis to St. Louis flight tickets
United Airlines
Mar 26
IND1:50 pmIndianapolis
3h 33m
1 stop
STL4:23 pmLambert-St Louis
Mar 29
STL7:45 amLambert-St Louis
4h 07m
1 stop
IND12:52 pmIndianapolis
$318
United Airlines
Apr 8
IND6:10 pmIndianapolis
6h 01m
1 stop
STL11:11 pmLambert-St Louis
Apr 11
STL6:30 amLambert-St Louis
3h 40m
1 stop
IND11:10 amIndianapolis
$322
United Airlines
Apr 3
IND10:30 amIndianapolis
4h 54m
1 stop
STL2:24 pmLambert-St Louis
Apr 5
STL8:15 pmLambert-St Louis
3h 39m
1 stop
IND12:54 amIndianapolis
$337

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 March 10, 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

Sun 4/12

7:09 pm-7:51 am

1 stop13h 42m

Lambert-St Louis

Thu 4/16

9:55 pm-12:57 pm

1 stop14h 02m

$171

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 4/13

12:18 pm-11:25 pm

2 stops12h 07m

Lambert-St Louis

Wed 4/15

8:23 pm-11:32 am

1 stop14h 09m

$185

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/10

8:30 pm-9:48 am

1 stop14h 18m

Lambert-St Louis

Mon 4/13

4:59 pm-11:11 am

1 stop17h 12m

$226
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 5/1

12:34 pm-11:19 pm

2 stops11h 45m

Lambert-St Louis

Sat 5/2

8:23 pm-11:17 am

1 stop13h 54m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 5/1

12:34 pm-11:19 pm

2 stops11h 45m

Lambert-St Louis

Sat 5/2

8:23 pm-11:17 am

1 stop13h 54m

$239

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/16

12:17 pm-6:50 am

1 stop19h 33m

Lambert-St Louis

Sun 4/19

4:59 pm-10:34 am

2 stops16h 35m

$241

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/16

12:17 pm-6:50 am

1 stop19h 33m

Lambert-St Louis

Sun 4/19

11:16 am-10:34 am

1 stop22h 18m

$245

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 4/16

8:46 pm-7:21 pm

1 stop23h 35m

Lambert-St Louis

Sun 4/19

9:55 pm-12:57 pm

1 stop14h 02m

$246

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/24

12:34 pm-6:50 am

1 stop19h 16m

Lambert-St Louis

Sun 4/26

4:59 pm-10:34 am

2 stops16h 35m

$250

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/3

8:30 pm-9:48 am

1 stop14h 18m

Lambert-St Louis

Fri 4/10

8:16 pm-7:32 pm

1 stop22h 16m

$261

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, November 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 $256. The month of April is another great option to travel to St. Louis, with average flight prices from Indianapolis averaging around $264.

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

As of March 2026, prices for Indianapolis to St. Louis flights are approximately 34% 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

1h 00m

Direct flights

Mon, Wed and Sat

Airports in St. Louis

1 airport
The fastest flight from Indianapolis to St. Louis takes 1h 00m
Direct flights go from Indianapolis to St. Louis on Monday, Wednesday and Saturday. There are no airlines offering direct flights.
There is 1 airport in St. Louis. From Indianapolis there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • 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 1h 00m 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
11,414 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
Florissant
Maryland Heights
O'Fallon
Collinsville
St. Peters
Fenton
Alton
Wentzville
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
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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