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Cheap flights from Indianapolis to St. Louis from $58

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 10/25. 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

Find the cheapest flights from Indianapolis to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:48 pm - 11:17 amIND  Indianapolis-STL Lambert-St Louis
40h 29m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl
Frontier Logo
2:29 pm - 6:53 pmSTL  Lambert-St Louis-IND Indianapolis
27h 24m1 stop Atlanta Hartsfield-Jackson
$177Frontier
Fri, Sep 11 - Fri, Sep 18
Frontier Logo
3:02 pm - 7:17 pmIND  Indianapolis-STL Lambert-St Louis
29h 15m1 stop Denver Intl
Frontier Logo
2:29 pm - 6:53 pmSTL  Lambert-St Louis-IND Indianapolis
27h 24m1 stop Atlanta Hartsfield-Jackson
$188Frontier
Fri, Sep 11 - Fri, Sep 18
Southwest Logo
10:20 am - 1:15 pmIND  Indianapolis-STL Lambert-St Louis
3h 55m1 stop Kansas City
Southwest Logo
6:15 pm - 10:40 pmSTL  Lambert-St Louis-IND Indianapolis
3h 25m1 stop Chicago Midway
$212Southwest
Fri, Sep 11 - Mon, Sep 14
Frontier Logo
10:44 am - 7:39 pmIND  Indianapolis-STL Lambert-St Louis
9h 55m1 stop Orlando
Frontier Logo
8:34 pm - 9:49 amSTL  Lambert-St Louis-IND Indianapolis
12h 15m1 stop Orlando
$216Frontier
Thu, Nov 5 - Mon, Nov 9
Southwest Logo
5:25 am - 11:35 amIND  Indianapolis-STL Lambert-St Louis
7h 10m1 stop Baltimore/Washington
Southwest Logo
11:40 am - 9:30 pmSTL  Lambert-St Louis-IND Indianapolis
8h 50m2 stops Baltimore/Washington Nashville Intl
$218Southwest
Fri, Sep 11 - Mon, Sep 14
Frontier Logo
8:56 pm - 7:17 pmIND  Indianapolis-STL Lambert-St Louis
23h 21m1 stop Denver Intl
Frontier Logo
5:19 pm - 6:53 pmSTL  Lambert-St Louis-IND Indianapolis
24h 34m2 stops Orlando Atlanta Hartsfield-Jackson
$224Frontier
Thu, Sep 10 - Thu, Sep 17
American Airlines Logo
6:50 am - 10:18 amIND  Indianapolis-STL Lambert-St Louis
4h 28m1 stop Chicago O'Hare Intl
American Airlines Logo
5:00 am - 10:26 amSTL  Lambert-St Louis-IND Indianapolis
4h 26m1 stop Chicago O'Hare Intl
$227American Airlines
Thu, Sep 10 - Thu, Sep 17
Southwest Logo
5:10 pm - 9:15 pmIND  Indianapolis-STL Lambert-St Louis
5h 05m1 stop Baltimore/Washington
Southwest Logo
5:55 am - 1:10 pmSTL  Lambert-St Louis-IND Indianapolis
6h 15m1 stop Baltimore/Washington
$228Southwest
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
5:10 pm - 9:15 pmIND  Indianapolis-STL Lambert-St Louis
5h 05m1 stop Baltimore/Washington
Southwest Logo
6:15 pm - 10:40 pmSTL  Lambert-St Louis-IND Indianapolis
3h 25m1 stop Chicago Midway
$229Southwest
Tue, Sep 8 - Thu, Sep 10
Southwest Logo
5:10 pm - 9:15 pmIND  Indianapolis-STL Lambert-St Louis
5h 05m1 stop Baltimore/Washington
Southwest Logo
6:15 pm - 10:40 pmSTL  Lambert-St Louis-IND Indianapolis
3h 25m1 stop Chicago Midway
$233Southwest
Tue, Sep 8 - Thu, Sep 10

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United Airlines flights from Indianapolis to St. Louis

Our best United Airlines deals on Indianapolis to St. Louis flight tickets
United Airlines
Sep 10
IND9:21 amIndianapolis
3h 36m
1 stop
STL11:57 amLambert-St Louis
Sep 16
STL7:56 amLambert-St Louis
3h 51m
1 stop
IND12:47 pmIndianapolis
$297
United Airlines
Aug 25
IND6:10 amIndianapolis
6h 52m
1 stop
STL12:02 pmLambert-St Louis
Aug 29
STL7:25 amLambert-St Louis
6h 36m
1 stop
IND3:01 pmIndianapolis
$303
United Airlines
Aug 28
IND7:00 amIndianapolis
6h 02m
1 stop
STL12:02 pmLambert-St Louis
Sep 1
STL7:25 amLambert-St Louis
6h 56m
1 stop
IND3:21 pmIndianapolis
$373

Southwest flights from Indianapolis to St. Louis

Our best Southwest deals on Indianapolis to St. Louis flight tickets
Southwest
Sep 11
IND10:20 amIndianapolis
3h 55m
1 stop
STL1:15 pmLambert-St Louis
Sep 14
STL6:15 pmLambert-St Louis
3h 25m
1 stop
IND10:40 pmIndianapolis
$212
Southwest
Sep 11
IND5:25 amIndianapolis
7h 10m
1 stop
STL11:35 amLambert-St Louis
Sep 14
STL11:40 amLambert-St Louis
8h 50m
2 stops
IND9:30 pmIndianapolis
$218
Southwest
Sep 9
IND5:10 pmIndianapolis
5h 05m
1 stop
STL9:15 pmLambert-St Louis
Sep 16
STL5:55 amLambert-St Louis
6h 15m
1 stop
IND1:10 pmIndianapolis
$228

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 August 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 Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Fri 9/11

7:48 pm-11:17 am

2 stops40h 29m

Lambert-St Louis

Fri 9/18

2:29 pm-6:53 pm

1 stop27h 24m

$177

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Fri 9/11

3:02 pm-7:17 pm

1 stop29h 15m

Lambert-St Louis

Fri 9/18

2:29 pm-6:53 pm

1 stop27h 24m

$188
Quickest round-trip

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Fri 9/11

10:20 am-1:15 pm

1 stop3h 55m

Lambert-St Louis

Mon 9/14

6:15 pm-10:40 pm

1 stop3h 25m

$212

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Thu 11/5

10:44 am-7:39 pm

1 stop9h 55m

Lambert-St Louis

Mon 11/9

8:34 pm-9:49 am

1 stop12h 15m

$216

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Fri 9/11

5:25 am-11:35 am

1 stop7h 10m

Lambert-St Louis

Mon 9/14

11:40 am-9:30 pm

2 stops8h 50m

$218

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Thu 9/10

8:56 pm-7:17 pm

1 stop23h 21m

Lambert-St Louis

Thu 9/17

5:19 pm-6:53 pm

2 stops24h 34m

$224

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Thu 9/10

6:50 am-10:18 am

1 stop4h 28m

Lambert-St Louis

Thu 9/17

5:00 am-10:26 am

1 stop4h 26m

$227

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Wed 9/9

5:10 pm-9:15 pm

1 stop5h 05m

Lambert-St Louis

Wed 9/16

5:55 am-1:10 pm

1 stop6h 15m

$228

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Tue 9/8

5:10 pm-9:15 pm

1 stop5h 05m

Lambert-St Louis

Thu 9/10

6:15 pm-10:40 pm

1 stop3h 25m

$229

IndianapolisSt. Louis

IND Indianapolis - STL Lambert-St Louis

INDSTL

Indianapolis

Tue 9/8

5:10 pm-9:15 pm

1 stop5h 05m

Lambert-St Louis

Thu 9/10

6:15 pm-10:40 pm

1 stop3h 25m

$233

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 January is another great option to travel to St. Louis, with average flight prices from Indianapolis averaging around $265.

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 August 2026, prices for Indianapolis to St. Louis flights are approximately 57% 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 55m

Direct flights

None
The fastest flight from Indianapolis to St. Louis takes 3h 55m
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 55m 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
St. Peters
Maryland Heights
Collinsville
Florissant
Alton
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
Grafton
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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