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$71+ Cheap flights from Indianapolis to St. Louis (IND - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
May 28 — Jun 41
Thu 5/28
Thu 6/4
1 adult, Economy
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3. Compare prices and book

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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 April 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/812:14 pm
IND
-
STL
2 stops13h 07m
Frontier
Tue 5/126:33 pm
STL
-
IND
1 stop15h 30m
Frontier
Deal found 4/23$258
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/2012:26 pm
IND
-
STL
2 stops28h 49m
Multiple Airlines
Wed 6/244:17 pm
STL
-
IND
1 stop25h 26m
Multiple Airlines
Deal found 4/27$263
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2311:10 am
IND
-
STL
1 stop5h 36m
United Airlines
Sat 5/305:29 pm
STL
-
IND
1 stop3h 36m
United Airlines
Deal found 4/23$265
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/2012:26 pm
IND
-
STL
2 stops28h 49m
Multiple Airlines
Sun 5/246:33 pm
STL
-
IND
1 stop15h 50m
Multiple Airlines
Deal found 4/27$266
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:35 am
IND
-
STL
1 stop4h 55m
Southwest
Sat 5/302:05 pm
STL
-
IND
2 stops5h 55m
Southwest
Deal found 4/23$271
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:28 am
IND
-
STL
1 stop4h 19m
United Airlines
Wed 6/246:00 am
STL
-
IND
1 stop3h 28m
United Airlines
Deal found 4/27$275
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/112:07 pm
IND
-
STL
2 stops19h 43m
Multiple Airlines
Tue 5/126:33 pm
STL
-
IND
1 stop15h 30m
Multiple Airlines
Deal found 4/23$278
This Southwest deal was found by Cheapflights users on 4/27. 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.
Tue 6/912:45 pm
IND
-
STL
2 stops6h 40m
Southwest
Wed 6/102:20 pm
STL
-
IND
1 stop8h 15m
Southwest
Deal found 4/27$298
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:20 pm
IND
-
STL
1 stop3h 58m
United Airlines
Sun 5/248:00 am
STL
-
IND
1 stop3h 54m
United Airlines
Deal found 4/27$306
This Southwest deal was found by Cheapflights users on 4/24. 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.
Fri 6/128:20 pm
IND
-
STL
1 stop5h 20m
Southwest
Wed 6/173:15 pm
STL
-
IND
2 stops6h 55m
Southwest
Deal found 4/24$311
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/286:10 am
IND
-
STL
2 stops12h 23m
Multiple Airlines
Sun 5/316:33 pm
STL
-
IND
1 stop15h 50m
Multiple Airlines
Deal found 4/26$313

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 April 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$258
(Kiwi.com)

One-way from

$71
(Kiwi.com)

Popular in

September

Cheapest in

November

Average price

$299
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
One-way flight from Indianapolis to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 28, 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 5/8

12:14 pm-12:21 am

2 stops13h 07m

Lambert-St Louis

Tue 5/12

6:33 pm-11:03 am

1 stop15h 30m

$258

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 5/23

11:10 am-3:46 pm

1 stop5h 36m

Lambert-St Louis

Sat 5/30

5:29 pm-10:05 pm

1 stop3h 36m

$265

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 5/23

6:35 am-10:30 am

1 stop4h 55m

Lambert-St Louis

Sat 5/30

2:05 pm-9:00 pm

2 stops5h 55m

$271

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 5/20

9:28 am-12:47 pm

1 stop4h 19m

Lambert-St Louis

Wed 6/24

6:00 am-10:28 am

1 stop3h 28m

$275

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 6/20

5:51 pm-8:39 pm

1 stop3h 48m

Lambert-St Louis

Wed 6/24

6:21 am-11:30 am

1 stop4h 09m

$306

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 6/12

7:59 pm-10:44 pm

1 stop3h 45m

Lambert-St Louis

Wed 6/17

6:00 am-10:28 am

1 stop3h 28m

$306
Quickest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Sat 6/13

6:33 pm-9:16 pm

1 stop3h 43m

Lambert-St Louis

Wed 6/17

6:00 am-10:28 am

1 stop3h 28m

$306

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 5/20

3:40 pm-9:18 pm

1 stop6h 38m

Lambert-St Louis

Sat 5/23

1:13 pm-7:01 pm

1 stop4h 48m

$315

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 6/9

12:45 pm-6:25 pm

2 stops6h 40m

Lambert-St Louis

Wed 6/10

3:15 pm-11:10 pm

2 stops6h 55m

$316

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 5/28

7:59 pm-11:59 pm

1 stop5h 00m

Lambert-St Louis

Sun 5/31

6:21 am-11:58 am

1 stop4h 37m

$318

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 21 resultsSorted by cheapest first
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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 April.
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.

Cheapflights Insights

Everything you need to know about your flight from Indianapolis to St. Louis

How much does it cost to fly round-trip from Indianapolis to St. Louis?

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 $271, Frontier can have you in St. Louis from Indianapolis in 4h 55m. 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
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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