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$112+ Cheap flights from Indianapolis to St. Louis (IND - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Cheap flight deals from Indianapolis to St. Louis

Cheapest flights from Indianapolis to St. Louis
Explore the most affordable flight options available from Indianapolis to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:39 pm
IND
-
STL
1 stop22h 01m
Frontier
Sat 9/1210:35 am
STL
-
IND
1 stop24h 09m
Frontier
Deal found 7/23$112
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:49 pm
IND
-
STL
2 stops13h 51m
Frontier
Fri 9/1110:35 am
STL
-
IND
1 stop24h 09m
Frontier
Deal found 7/23$189
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:49 pm
IND
-
STL
2 stops13h 51m
Frontier
Thu 9/1010:35 am
STL
-
IND
1 stop24h 09m
Frontier
Deal found 7/23$194
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:20 pm
IND
-
STL
2 stops12h 39m
Frontier
Thu 8/136:34 pm
STL
-
IND
1 stop15h 51m
Frontier
Deal found 7/22$201
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:39 pm
IND
-
STL
1 stop22h 01m
Frontier
Fri 9/118:10 pm
STL
-
IND
2 stops14h 34m
Frontier
Deal found 7/23$215
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:39 pm
IND
-
STL
1 stop22h 01m
Frontier
Thu 9/108:10 pm
STL
-
IND
2 stops14h 34m
Frontier
Deal found 7/23$217
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:20 pm
IND
-
STL
1 stop7h 55m
Frontier
Sat 9/1210:35 am
STL
-
IND
1 stop24h 09m
Frontier
Deal found 7/23$219
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2312:39 pm
IND
-
STL
1 stop22h 01m
Frontier
Mon 10/268:10 pm
STL
-
IND
2 stops14h 34m
Frontier
Deal found 7/23$231
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/145:00 pm
IND
-
STL
1 stop6h 05m
Southwest
Tue 9/158:35 am
STL
-
IND
1 stop6h 05m
Southwest
Deal found 7/22$233

Find flight deals from Indianapolis to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Indianapolis (IND) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$112
(Kiwi.com)

Popular in

February

Cheapest in

November

Average price

$336
Provider with most accurate pricing for Indianapolis-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Indianapolis-Lambert-St Louis flights.
Search Deals
From Indianapolis to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 27, 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

Mon 9/14

5:00 pm-10:10 pm

1 stop6h 10m

Lambert-St Louis

Tue 9/15

8:35 am-3:40 pm

1 stop6h 05m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 11/17

5:49 pm-8:37 pm

1 stop3h 48m

Lambert-St Louis

Mon 11/23

5:45 pm-12:04 am

1 stop5h 19m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/12

5:50 am-10:05 am

1 stop5h 15m

Lambert-St Louis

Thu 8/13

2:25 pm-10:55 pm

1 stop7h 30m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 8/18

5:35 pm-10:10 pm

1 stop5h 35m

Lambert-St Louis

Wed 8/19

2:45 pm-9:00 pm

1 stop5h 15m

$233

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 9/2

6:34 am-9:37 am

1 stop4h 03m

Lambert-St Louis

Wed 9/9

6:40 am-11:31 am

1 stop3h 51m

$243
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/26

10:32 am-1:14 pm

1 stop3h 42m

Lambert-St Louis

Tue 9/1

6:30 am-11:32 am

1 stop4h 02m

$243

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 9/17

6:35 am-9:29 am

1 stop3h 54m

Lambert-St Louis

Wed 9/23

6:40 am-11:31 am

1 stop3h 51m

$243

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 8/29

5:50 pm-8:42 pm

1 stop3h 52m

Lambert-St Louis

Sun 9/6

6:30 am-11:32 am

1 stop4h 02m

$243

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 8/15

12:55 pm-3:25 pm

1 stop3h 30m

Lambert-St Louis

Mon 8/17

8:30 am-6:30 pm

2 stops9h 00m

$251

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 8/25

10:32 am-1:14 pm

1 stop3h 42m

Lambert-St Louis

Mon 8/31

3:39 pm-12:27 am

1 stop7h 48m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Indianapolis to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Indianapolis to St. Louis in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Indianapolis-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Indianapolis-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Indianapolis-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Indianapolis-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Indianapolis-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Indianapolis to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Indianapolis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Indianapolis to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Indianapolis to St. Louis?

    For as low as $233, Southwest can have you in St. Louis from Indianapolis in 3h 48m. Indianapolis and St. Louis are separated by a distance of 228 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Indianapolis to St. Louis that include hotel bookings?

    Yes. In addition to deals on Indianapolis to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Indianapolis to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Indianapolis to St. Louis.

  • Can I find deals for business class flights from Indianapolis to St. Louis?

    Yes. Cheapflights offers flight deals from Indianapolis to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

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