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Cheap flights from Indianapolis to St. Louis from $110

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 7/3. 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

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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
1:44 pm - 6:18 pm
IND
-
STL
5h 34m
1 stop
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
$147Frontier
Wed, Jul 1 - Tue, Jul 7
Frontier Logo
1:44 pm - 6:18 pm
IND
-
STL
5h 34m
1 stop
Frontier Logo
6:31 pm - 11:19 am
STL
-
IND
15h 48m
1 stop
$207Frontier
Wed, Jun 24 - Thu, Jun 25
Frontier Logo
7:10 pm - 11:59 pm
IND
-
STL
29h 49m
1 stop
Frontier Logo
4:09 pm - 6:56 pm
STL
-
IND
25h 47m
1 stop
$233Frontier
Tue, Aug 11 - Mon, Aug 17
Frontier Logo
1:44 pm - 6:18 pm
IND
-
STL
5h 34m
1 stop
Frontier Logo
8:08 pm - 11:25 am
STL
-
IND
14h 17m
2 stops
$235Frontier
Wed, Jul 1 - Tue, Jul 7
Frontier Logo
1:44 pm - 6:18 pm
IND
-
STL
5h 34m
1 stop
Frontier Logo
4:09 pm - 10:03 am
STL
-
IND
16h 54m
1 stop
$242Frontier
Wed, Jul 1 - Wed, Jul 8
Frontier Logo
12:20 pm - 8:57 am
IND
-
STL
21h 37m
1 stop
Frontier Logo
4:57 pm - 6:15 pm
STL
-
IND
24h 18m
2 stops
$248Frontier
Fri, Jul 17 - Mon, Jul 20
American Airlines Logo
8:55 pm - 12:14 am
IND
-
STL
4h 19m
1 stop
American Airlines Logo
5:59 am - 11:38 am
STL
-
IND
4h 39m
1 stop
$255American Airlines
Mon, Aug 17 - Thu, Aug 20
Frontier Logo
12:20 pm - 8:57 am
IND
-
STL
21h 37m
1 stop
Frontier Logo
4:09 pm - 6:15 pm
STL
-
IND
25h 06m
1 stop
$258Frontier
Fri, Jul 17 - Mon, Jul 20
Frontier Logo
7:08 pm - 5:30 pm
IND
-
STL
23h 22m
2 stops
Frontier Logo
6:34 pm - 11:25 am
STL
-
IND
15h 51m
1 stop
$273Frontier
Wed, Jul 1 - Tue, Jul 7
Frontier Logo
6:32 pm - 11:59 pm
IND
-
STL
6h 27m
1 stop
Frontier Logo
4:09 pm - 10:03 am
STL
-
IND
16h 54m
1 stop
$276Frontier
Fri, Jul 10 - Sat, Jul 11

American Airlines flights from Indianapolis to St. Louis

Our best American Airlines deals on Indianapolis to St. Louis flight tickets
American Airlines
Aug 17
IND8:55 pmIndianapolis
4h 19m
1 stop
STL12:14 amLambert-St Louis
Aug 20
STL5:59 amLambert-St Louis
4h 39m
1 stop
IND11:38 amIndianapolis
$255
American Airlines
Jun 28
IND5:10 amIndianapolis
4h 21m
1 stop
STL8:31 amLambert-St Louis
Jul 1
STL8:14 pmLambert-St Louis
3h 38m
1 stop
IND12:52 amIndianapolis
$326
American Airlines
Jul 3
IND10:35 amIndianapolis
3h 22m
1 stop
STL12:57 pmLambert-St Louis
Jul 5
STL6:55 amLambert-St Louis
3h 45m
1 stop
IND11:40 amIndianapolis
$359

United Airlines flights from Indianapolis to St. Louis

Our best United Airlines deals on Indianapolis to St. Louis flight tickets
United Airlines
Aug 17
IND7:31 pmIndianapolis
4h 28m
1 stop
STL10:59 pmLambert-St Louis
Aug 20
STL7:25 amLambert-St Louis
6h 52m
1 stop
IND3:17 pmIndianapolis
$325
United Airlines
Jun 29
IND8:10 pmIndianapolis
4h 19m
1 stop
STL11:29 pmLambert-St Louis
Jul 6
STL9:20 amLambert-St Louis
4h 43m
1 stop
IND3:03 pmIndianapolis
$347
United Airlines
Jun 16
IND7:00 amIndianapolis
6h 11m
1 stop
STL12:11 pmLambert-St Louis
Jun 20
STL1:13 pmLambert-St Louis
4h 48m
1 stop
IND7:01 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 June 4, 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 7/1

1:44 pm-6:18 pm

1 stop5h 34m

Lambert-St Louis

Tue 7/7

6:34 pm-11:25 am

1 stop15h 51m

$147

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 6/24

1:44 pm-6:18 pm

1 stop5h 34m

Lambert-St Louis

Thu 6/25

6:31 pm-11:19 am

1 stop15h 48m

$207

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 8/11

7:10 pm-11:59 pm

1 stop29h 49m

Lambert-St Louis

Mon 8/17

4:09 pm-6:56 pm

1 stop25h 47m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 7/1

1:44 pm-6:18 pm

1 stop5h 34m

Lambert-St Louis

Tue 7/7

8:08 pm-11:25 am

2 stops14h 17m

$235

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 7/1

1:44 pm-6:18 pm

1 stop5h 34m

Lambert-St Louis

Wed 7/8

4:09 pm-10:03 am

1 stop16h 54m

$242

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 7/17

12:20 pm-8:57 am

1 stop21h 37m

Lambert-St Louis

Mon 7/20

4:57 pm-6:15 pm

2 stops24h 18m

$248
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Mon 8/17

8:55 pm-12:14 am

1 stop4h 19m

Lambert-St Louis

Thu 8/20

5:59 am-11:38 am

1 stop4h 39m

$255

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 7/17

12:20 pm-8:57 am

1 stop21h 37m

Lambert-St Louis

Mon 7/20

4:09 pm-6:15 pm

1 stop25h 06m

$258

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 7/1

7:08 pm-5:30 pm

2 stops23h 22m

Lambert-St Louis

Tue 7/7

6:34 pm-11:25 am

1 stop15h 51m

$273

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 7/10

6:32 pm-11:59 pm

1 stop6h 27m

Lambert-St Louis

Sat 7/11

4:09 pm-10:03 am

1 stop16h 54m

$276

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 June 2026, prices for Indianapolis to St. Louis flights are approximately 92% 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

5h 11m

Direct flights

None
The fastest flight from Indianapolis to St. Louis takes 5h 11m
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 5h 11m 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
St. Peters
Collinsville
Fenton
Alton
Wentzville
Farmington
Festus
Eureka
Clayton
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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