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$99+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IND
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$227
(Southwest)

One-way from

$99
(American Airlines)

Popular in

March

Cheapest in

April

Average price

$296
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. 4% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This Southwest deal was found by Cheapflights users on 7/29. 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.
Wed 8/272:15 pmSTL - IND
1 stop5h 00mSouthwest
Fri 8/296:00 pmIND - STL
1 stop5h 35mSouthwest
Deal found 7/29$227
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 9/106:10 amSTL - IND
1 stop3h 10mAmerican Airlines
Fri 9/129:36 amIND - STL
1 stop4h 36mAmerican Airlines
Deal found 7/28$247
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/137:29 pmSTL - IND
1 stop15h 46mFrontier
Thu 8/146:48 pmIND - STL
1 stop5h 59mFrontier
Deal found 7/27$271
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/242:30 pmSTL - IND
2 stops21h 23mSpirit Airlines
Sun 8/315:05 amIND - STL
2 stops9h 27mSpirit Airlines
Deal found 7/27$293
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:50 amSTL - IND
3 stops22h 28mMultiple Airlines
Sun 9/287:43 pmIND - STL
3 stops23h 53mMultiple Airlines
Deal found 7/27$393
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Mon 8/115:30 pmSTL - IND
1 stop5h 13mUnited Airlines
Fri 8/157:20 amIND - STL
1 stop6h 07mUnited Airlines
Deal found 7/27$437

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 July 29, 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

Wed 8/27

2:15 pm-8:15 pm

1 stop5h 00m

Indianapolis

Fri 8/29

6:00 pm-10:35 pm

1 stop5h 35m

$227

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 9/10

2:11 pm-9:35 pm

1 stop6h 24m

Indianapolis

Fri 9/12

9:36 am-1:12 pm

1 stop4h 36m

$247

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Wed 8/13

7:29 pm-12:15 pm

1 stop15h 46m

Indianapolis

Thu 8/14

6:48 pm-11:47 pm

1 stop5h 59m

$271

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sun 8/24

2:30 pm-12:53 pm

2 stops21h 23m

Indianapolis

Sun 8/31

5:05 am-1:32 pm

2 stops9h 27m

$293

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Fri 9/26

9:50 am-9:18 am

3 stops22h 28m

Indianapolis

Sun 9/28

7:43 pm-6:36 pm

3 stops23h 53m

$393

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Mon 8/11

5:30 pm-11:43 pm

1 stop5h 13m

Indianapolis

Fri 8/15

7:20 am-12:27 pm

1 stop6h 07m

$437

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/26

6:26 am-12:19 pm

1 stop4h 53m

$99

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Tue 8/26

11:35 am-8:15 pm

2 stops7h 40m

$104

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 8/9

5:40 pm-5:53 pm

1 stop23h 13m

$106

St. LouisIndianapolis

STL - IND

STLIND

Lambert-St Louis

Sat 8/9

3:34 pm-3:24 pm

2 stops22h 50m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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 $361). 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 July 29, 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.

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 July 29, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from St. Louis to Indianapolis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,899 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,040 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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 Southwest is currently your cheapest option to Indianapolis, with prices starting at $227. Additional round-trip tickets that might be worth considering are offered by American Airlines and Frontier, with the lowest prices starting at $247 and $271, respectively. Southwest is 37% 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?

    $99 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Southwest and Frontier, with prices starting from $104 and $106, 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 $361). 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 Indianapolis?

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

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Top 3 airlines flying from St. Louis to Indianapolis

Discover the top 3 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$216Average$287FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$226Average$306FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$234Average$441FlexibilityNo cancel feeOn-time69%

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