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$100+ Cheap flights from St. Louis to Indianapolis (STL - IND)

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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IND
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from St. Louis to Indianapolis

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Indianapolis (IND). 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 June 12, 2025.

Round-trip from

$231
(American Airlines)

One-way from

$100
(Mytrip)

Popular in

March

Cheapest in

April

Average price

$431
From Lambert-St Louis to Indianapolis
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One-way flight from Lambert-St Louis to Indianapolis
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Highest demand for flights based on searches. 6% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from St. Louis to Indianapolis

Cheapest flights from St. Louis to Indianapolis
Explore the most affordable flight options available from St. Louis to Indianapolis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/198:01 pmSTL - IND
1 stop12h 59mAmerican Airlines
Fri 8/221:12 pmIND - STL
1 stop4h 44mAmerican Airlines
Deal found 6/10$231
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 7/15:00 amSTL - IND
1 stop5h 04mUnited Airlines
Fri 7/46:00 amIND - STL
1 stop5h 40mUnited Airlines
Deal found 6/11$237
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:45 amSTL - IND
1 stop3h 30mDelta
Fri 10/37:35 pmIND - STL
1 stop4h 27mDelta
Deal found 6/11$245
This Southwest deal was found by Cheapflights users on 6/9. 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 8/25:55 amSTL - IND
1 stop4h 35mSouthwest
Mon 8/47:50 pmIND - STL
1 stop5h 45mSouthwest
Deal found 6/9$247
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/105:26 pmSTL - IND
1 stop28h 42mSpirit Airlines
Thu 7/176:30 amIND - STL
1 stop11h 01mSpirit Airlines
Deal found 6/12$253
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1010:47 amSTL - IND
2 stops35h 16mMultiple Airlines
Thu 7/176:30 amIND - STL
1 stop11h 01mMultiple Airlines
Deal found 6/12$263
This FlightHub deal was found by Cheapflights users on 6/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/228:44 pmSTL - IND
1 stop13h 06mFrontier
Mon 6/237:02 pmIND - STL
1 stop5h 51mFrontier
Deal found 6/12$459

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Indianapolis 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 June 12, 2025.
Use the filters below to find and compare flights from St. Louis to Indianapolis that are best for you.

Fly from

St. Louis

Fly to

Indianapolis

Route

Depart

Return

Price

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/19

8:01 pm-10:00 am

1 stop12h 59m

Indianapolis

Fri 8/22

1:12 pm-4:56 pm

1 stop4h 44m

$231

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 7/1

5:00 am-11:04 am

1 stop5h 04m

Indianapolis

Fri 7/4

6:00 am-10:40 am

1 stop5h 40m

$237

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 8/2

5:55 am-11:30 am

1 stop4h 35m

Indianapolis

Mon 8/4

7:50 pm-12:35 am

1 stop5h 45m

$247

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 7/10

5:26 pm-11:08 pm

1 stop28h 42m

Indianapolis

Thu 7/17

6:30 am-4:31 pm

1 stop11h 01m

$253

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Thu 7/10

10:47 am-11:03 pm

2 stops35h 16m

Indianapolis

Thu 7/17

6:30 am-4:31 pm

1 stop11h 01m

$263

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 7/4

1:30 pm-9:39 pm

1 stop7h 09m

Indianapolis

Sun 7/6

8:02 pm-11:51 pm

1 stop4h 49m

$277

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sun 6/22

8:44 pm-10:50 am

1 stop13h 06m

Indianapolis

Mon 6/23

7:02 pm-11:53 pm

1 stop5h 51m

$459

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 7/7

7:13 pm-10:19 am

2 stops14h 06m

$100

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 8/6

6:06 am-10:00 am

1 stop26h 54m

$103

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 8/6

11:10 am-8:15 pm

2 stops8h 05m

$117

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 14 results
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Best time to book a flight from St. Louis to Indianapolis

Have a flexible travel schedule? Discover the best time to fly to Indianapolis from St. Louis 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 St. Louis to Indianapolis

What is the cheapest month to book a flight from St. Louis to Indianapolis?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Indianapolis (average of $297). Flying from St. Louis to Indianapolis in March is currently the most expensive (average of $360). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to IND?

Find hourly flight availability from St. Louis to Indianapolis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 81% on flights from St. Louis to Indianapolis by exploring options for tickets at noon.

Rainfall in Indianapolis by month

Plan your trip to Indianapolis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Indianapolis ranges from 2.3 - 5.1 inches per month. May is typically the wettest month, when rainfall can reach 5.1 in. February is typically the driest time to visit Indianapolis when rainfall is around 2.3 in.

Temperature in Indianapolis by month

Plan your trip to Indianapolis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Indianapolis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

Reviews of airlines servicing Indianapolis

Get insights into the airlines that provide service to Indianapolis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Indianapolis. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Southwest, Delta and United Airlines from St. Louis to Indianapolis. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,946 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,052 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

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

  • What are the cheapest airlines flying from St. Louis to Indianapolis round-trip?

    Flying on American Airlines is currently your cheapest option to Indianapolis, with prices starting at $231. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $237 and $247, respectively. American Airlines is 35% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Indianapolis one-way?

    $100 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on American Airlines and Southwest, with prices starting from $103 and $117, respectively.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from St. Louis to Indianapolis?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Indianapolis (average of $297). Flying from St. Louis to Indianapolis in March is currently the most expensive (average of $360). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Greenwood
Bloomington
Terre Haute
Noblesville
Muncie
Fishers
Anderson
Kokomo
Franklin
Plainfield
Crawfordsville
Carmel
Shelbyville
Speedway

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Alternative routes for St. Louis to Indianapolis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from St. Louis to Indianapolis

Discover the top 2 airlines that operate flights from St. Louis to Indianapolis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$216Average$266FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$226Average$306FlexibilityNo cancel feeOn-time71%

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