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Cheap flights from Indianapolis to St. Louis from $76

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 4/28. 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
8:46 pm - 7:32 pm
IND
-
STL
23h 46m
1 stop
Frontier Logo
8:17 pm - 7:54 pm
STL
-
IND
22h 37m
1 stop
$151Frontier
Fri, May 1 - Mon, May 4
Frontier Logo
8:23 am - 11:19 pm
IND
-
STL
15h 56m
1 stop
Frontier Logo
4:59 pm - 7:38 am
STL
-
IND
13h 39m
1 stop
$171Frontier
Fri, Apr 17 - Sat, Apr 18
Frontier Logo
5:30 pm - 11:25 pm
IND
-
STL
6h 55m
1 stop
Frontier Logo
8:39 am - 3:22 pm
STL
-
IND
5h 43m
1 stop
$180Frontier
Mon, Apr 13 - Fri, Apr 17
Multiple Airlines Logo
8:00 am - 6:50 am
IND
-
STL
23h 50m
2 stops
Multiple Airlines Logo
6:41 pm - 11:23 am
STL
-
IND
15h 42m
1 stop
$181Multiple Airlines
Tue, Apr 28 - Tue, May 5
Frontier Logo
12:07 pm - 11:19 pm
IND
-
STL
12h 12m
1 stop
Frontier Logo
6:41 pm - 11:23 am
STL
-
IND
15h 42m
1 stop
$182Frontier
Tue, Apr 28 - Tue, May 5
Frontier Logo
7:09 pm - 7:51 am
IND
-
STL
13h 42m
1 stop
Frontier Logo
4:59 pm - 10:27 am
STL
-
IND
16h 28m
1 stop
$191Frontier
Sun, Apr 12 - Wed, Apr 15
Frontier Logo
12:07 pm - 11:19 pm
IND
-
STL
12h 12m
1 stop
Frontier Logo
9:55 pm - 12:57 pm
STL
-
IND
14h 02m
1 stop
$201Frontier
Wed, Apr 15 - Sun, Apr 19
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
$212Frontier
Fri, Apr 10 - Tue, Apr 14
Multiple Airlines Logo
5:08 pm - 11:25 pm
IND
-
STL
7h 17m
1 stop
Multiple Airlines Logo
8:23 pm - 11:32 am
STL
-
IND
14h 09m
1 stop
$233Multiple Airlines
Sat, Apr 11 - Wed, Apr 15
Frontier Logo
7:14 pm - 11:19 pm
IND
-
STL
29h 05m
1 stop
Frontier Logo
8:23 pm - 7:54 pm
STL
-
IND
22h 31m
2 stops
$247Frontier
Mon, Apr 27 - Mon, May 4

Frontier flights from Indianapolis to St. Louis

Our best Frontier deals on Indianapolis to St. Louis flight tickets
Frontier
May 1
IND8:46 pmIndianapolis
23h 46m
1 stop
STL7:32 pmLambert-St Louis
May 4
STL8:17 pmLambert-St Louis
22h 37m
1 stop
IND7:54 pmIndianapolis
$151
Frontier
Apr 17
IND8:23 amIndianapolis
15h 56m
1 stop
STL11:19 pmLambert-St Louis
Apr 18
STL4:59 pmLambert-St Louis
13h 39m
1 stop
IND7:38 amIndianapolis
$171
Frontier
Apr 13
IND5:30 pmIndianapolis
6h 55m
1 stop
STL11:25 pmLambert-St Louis
Apr 17
STL8:39 amLambert-St Louis
5h 43m
1 stop
IND3:22 pmIndianapolis
$180

Southwest flights from Indianapolis to St. Louis

Our best Southwest deals on Indianapolis to St. Louis flight tickets
Southwest
Apr 28
IND5:15 pmIndianapolis
5h 55m
2 stops
STL10:10 pmLambert-St Louis
May 5
STL5:35 amLambert-St Louis
6h 05m
2 stops
IND12:40 pmIndianapolis
$285
Southwest
Aug 26
IND7:40 amIndianapolis
7h 15m
2 stops
STL1:55 pmLambert-St Louis
Aug 29
STL5:15 amLambert-St Louis
7h 30m
1 stop
IND1:45 pmIndianapolis
$342
Southwest
Apr 2
IND2:40 pmIndianapolis
1h 00m
STL2:40 pmLambert-St Louis
Apr 4
STL12:45 pmLambert-St Louis
7h 30m
1 stop
IND9:15 pmIndianapolis
$346

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 1, 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 5/1

8:46 pm-7:32 pm

1 stop23h 46m

Lambert-St Louis

Mon 5/4

8:17 pm-7:54 pm

1 stop22h 37m

$151

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/17

8:23 am-11:19 pm

1 stop15h 56m

Lambert-St Louis

Sat 4/18

4:59 pm-7:38 am

1 stop13h 39m

$171
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 4/13

5:30 pm-11:25 pm

1 stop6h 55m

Lambert-St Louis

Fri 4/17

8:39 am-3:22 pm

1 stop5h 43m

$180

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 4/28

8:00 am-6:50 am

2 stops23h 50m

Lambert-St Louis

Tue 5/5

6:41 pm-11:23 am

1 stop15h 42m

$181

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 4/28

12:07 pm-11:19 pm

1 stop12h 12m

Lambert-St Louis

Tue 5/5

6:41 pm-11:23 am

1 stop15h 42m

$182

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sun 4/12

7:09 pm-7:51 am

1 stop13h 42m

Lambert-St Louis

Wed 4/15

4:59 pm-10:27 am

1 stop16h 28m

$191

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 4/15

12:07 pm-11:19 pm

1 stop12h 12m

Lambert-St Louis

Sun 4/19

9:55 pm-12:57 pm

1 stop14h 02m

$201

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 4/10

8:30 pm-9:48 am

1 stop14h 18m

Lambert-St Louis

Tue 4/14

4:59 pm-11:11 am

1 stop17h 12m

$212

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 4/11

5:08 pm-11:25 pm

1 stop7h 17m

Lambert-St Louis

Wed 4/15

8:23 pm-11:32 am

1 stop14h 09m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 4/27

7:14 pm-11:19 pm

1 stop29h 05m

Lambert-St Louis

Mon 5/4

8:23 pm-7:54 pm

2 stops22h 31m

$247

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, 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.

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 81% 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 and Wed

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 and Wednesday. 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
11,544 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
Edwardsville
Litchfield
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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