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$103+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap 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 junio 12, 2025.

Round-trip from

$223
(Southwest)

One-way from

$103
(American Airlines)

Popular in

January

Cheapest in

April

Average price

$334
From Indianapolis to Lambert-St Louis
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One-way flight from Indianapolis to Lambert-St Louis
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Highest demand for flights based on searches. 11% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 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 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 junio 12, 2025.

This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/812:55 pmIND - STL
1 stop4h 35mSouthwest
jue. 10/96:15 amSTL - IND
1 stop6h 20mSouthwest
Deal found 6/10$223
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/55:15 pmIND - STL
2 stops24h 49mSpirit Airlines
lun. 7/77:13 pmSTL - IND
2 stops14h 06mSpirit Airlines
Deal found 6/11$228
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/81:03 pmIND - STL
1 stop22h 26mMultiple Airlines
mar. 7/155:26 pmSTL - IND
1 stop25h 46mMultiple Airlines
Deal found 6/10$234
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/16:30 amIND - STL
1 stop4h 07mDelta
vie. 7/41:30 pmSTL - IND
1 stop7h 09mDelta
Deal found 6/10$237
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/85:48 amIND - STL
1 stop3h 32mAmerican Airlines
mar. 8/128:01 pmSTL - IND
1 stop12h 59mAmerican Airlines
Deal found 6/12$246
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/183:30 pmIND - STL
1 stop23h 29mFrontier
dom. 7/202:36 pmSTL - IND
1 stop23h 08mFrontier
Deal found 6/11$253
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.
jue. 6/269:22 amIND - STL
1 stop4h 05mUnited Airlines
lun. 6/305:30 pmSTL - IND
1 stop3h 30mUnited Airlines
Deal found 6/11$367

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 junio 12, 2025.
Use the filters below to find and compare flights from Indianapolis to St. Louis that are best for you.

Fly from

Indianapolis

Fly to

St. Louis

Route

Depart

Return

Price

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

mié. 10/8

12:55 pm-4:30 pm

1 stop4h 35m

Lambert-St Louis

jue. 10/9

6:15 am-1:35 pm

1 stop6h 20m

$223

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

sáb. 7/5

5:15 pm-5:04 pm

2 stops24h 49m

Lambert-St Louis

lun. 7/7

7:13 pm-10:19 am

2 stops14h 06m

$228

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

mar. 7/8

1:03 pm-10:29 am

1 stop22h 26m

Lambert-St Louis

mar. 7/15

5:26 pm-8:12 pm

1 stop25h 46m

$234

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

mar. 7/1

6:30 am-9:37 am

1 stop4h 07m

Lambert-St Louis

vie. 7/4

1:30 pm-9:39 pm

1 stop7h 09m

$237

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

vie. 8/8

5:48 am-8:20 am

1 stop3h 32m

Lambert-St Louis

mar. 8/12

8:01 pm-10:00 am

1 stop12h 59m

$246

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

vie. 7/18

3:30 pm-1:59 pm

1 stop23h 29m

Lambert-St Louis

dom. 7/20

2:36 pm-2:44 pm

1 stop23h 08m

$253

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

jue. 6/26

9:22 am-12:27 pm

1 stop4h 05m

Lambert-St Louis

lun. 6/30

5:30 pm-10:00 pm

1 stop3h 30m

$367

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

jue. 8/7

10:30 am-8:18 pm

1 stop10h 48m

$103

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

mié. 7/9

10:15 am-9:52 am

2 stops24h 37m

$114

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

lun. 6/30

6:48 pm-11:36 pm

1 stop5h 48m

$119

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 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

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

Currently, August is the cheapest month in which you can book a flight from Indianapolis to St. Louis (average of $311). Flying from Indianapolis to St. Louis in March is currently the most expensive (average of $356). 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 IND to STL?

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

A simple way to save on the total cost of your ticket is to fly from Indianapolis to St. Louis in the evening. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight at noon.

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

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

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated junio 12, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines from Indianapolis to St. Louis to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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

Food

7.1

Entertainment

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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

Food

7.1

Entertainment

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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

Food

7.1

Entertainment

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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

Food

7.1

Entertainment

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

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 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.

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

    Flying on Southwest is currently your cheapest option to St. Louis, with prices starting at $223. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and Delta, with the lowest prices starting at $228 and $237, respectively. Southwest is 40% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Indianapolis to St. Louis are American Airlines ($103), Spirit Airlines ($114), and Delta ($119).

  • 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.

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

    Currently, August is the cheapest month in which you can book a flight from Indianapolis to St. Louis (average of $311). Flying from Indianapolis to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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Alternative routes for Indianapolis to St. Louis

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Top 3 airlines flying from Indianapolis to St. Louis

Discover the top 3 airlines that operate flights from Indianapolis to St. Louis. 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$216Average$366FlexibilityNo cancel feeOn-time69%
DeltaCheapest$226Average$388FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$345FlexibilityNo cancel feeOn-time71%

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