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$81+ 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:20 amIND - STL
1 stop4h 06mUnited Airlines
Mon 12/293:10 pmSTL - IND
1 stop5h 49mUnited Airlines
Deal found 12/10$380
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:11 pmIND - STL
1 stop4h 44mAmerican Airlines
Fri 1/26:41 amSTL - IND
1 stop5h 37mAmerican Airlines
Deal found 12/11$401
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:15 amIND - STL
1 stop15h 27mMultiple Airlines
Sun 12/2110:57 amSTL - IND
1 stop23h 48mMultiple Airlines
Deal found 12/9$418
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:20 amIND - STL
1 stop4h 06mUnited Airlines
Sun 1/46:35 pmSTL - IND
1 stop4h 09mUnited Airlines
Deal found 12/10$437
This Delta deal was found by Cheapflights users on 12/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:30 amIND - STL
1 stop3h 54mDelta
Fri 12/267:00 amSTL - IND
1 stop5h 31mDelta
Deal found 12/9$502
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2112:38 pmIND - STL
2 stops10h 55mMultiple Airlines
Tue 12/2310:48 amSTL - IND
1 stop5h 56mMultiple Airlines
Deal found 12/10$521
This Frontier deal was found by Cheapflights users on 12/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:06 pmIND - STL
1 stop6h 27mFrontier
Tue 12/2310:48 amSTL - IND
1 stop5h 56mFrontier
Deal found 12/10$522
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/168:48 amIND - STL
2 stops49h 52mMultiple Airlines
Mon 12/2210:40 amSTL - IND
1 stop11h 03mMultiple Airlines
Deal found 12/11$534
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:15 pmIND - STL
1 stop6h 28mUnited Airlines
Sun 12/286:30 amSTL - IND
1 stop5h 39mUnited Airlines
Deal found 12/9$560
This Southwest deal was found by Cheapflights users on 12/9. 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.
Fri 12/1910:40 amIND - STL
2 stops8h 15mSouthwest
Sun 12/213:45 pmSTL - IND
2 stops8h 05mSouthwest
Deal found 12/9$597

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$153
(Kiwi.com)

One-way from

$81
(Frontier)

Popular in

September

Cheapest in

November

Average price

$388
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. 6% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 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

Thu 1/22

8:31 pm-10:23 am

1 stop14h 52m

Lambert-St Louis

Mon 1/26

5:42 pm-6:23 pm

1 stop23h 41m

$153

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/22

8:31 pm-10:23 am

1 stop14h 52m

Lambert-St Louis

Mon 1/26

10:16 am-6:38 pm

1 stop7h 22m

$185

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 1/14

12:21 pm-10:34 pm

1 stop11h 13m

Lambert-St Louis

Fri 1/16

5:11 pm-11:00 am

1 stop16h 49m

$199

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/17

3:12 pm-6:51 am

2 stops16h 39m

Lambert-St Louis

Fri 2/20

3:49 pm-9:33 am

1 stop16h 44m

$235

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 1/9

8:55 pm-10:02 am

1 stop14h 07m

Lambert-St Louis

Fri 1/23

8:22 pm-6:23 pm

2 stops21h 01m

$247

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/8

7:25 pm-11:39 pm

1 stop5h 14m

Lambert-St Louis

Thu 1/15

6:35 am-2:07 pm

1 stop6h 32m

$271

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 2/18

8:30 am-4:30 pm

2 stops9h 00m

Lambert-St Louis

Fri 2/20

9:55 am-6:05 pm

2 stops7h 10m

$280

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 2/17

5:58 pm-9:00 pm

1 stop4h 02m

Lambert-St Louis

Fri 2/20

6:30 am-1:17 pm

1 stop5h 47m

$287

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 1/21

12:52 pm-4:45 pm

1 stop4h 53m

Lambert-St Louis

Fri 1/23

5:25 pm-11:06 pm

1 stop4h 41m

$287

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Thu 1/22

7:00 am-12:45 pm

2 stops6h 45m

Lambert-St Louis

Mon 1/26

2:15 pm-10:05 pm

2 stops6h 50m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 21 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Indianapolis-St. Louis flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

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

Currently, October is the cheapest month in which you can book a flight from Indianapolis to St. Louis (average of $85). Flying from Indianapolis to St. Louis in December is currently the most expensive (average of $279). 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 December 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 15% on your trip compared to booking a flight at noon.

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 December 12, 2025.
Peruse reviews from past customers who have flown with American Airlines from Indianapolis to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,050 reviews

Food

6.5

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,050 reviews
American Airlines
7.2
Good
11,050 reviews

Food

6.5

Comfort

7.2

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

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 $185, Frontier can have you in St. Louis from Indianapolis in 14h 52m. Indianapolis and St. Louis are separated by a distance of 228 mi.

  • What is the cheapest airline to fly from Indianapolis to St. Louis round-trip?

    Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $196. American Airlines is 47% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, October is the cheapest month in which you can book a flight from Indianapolis to St. Louis (average of $85). Flying from Indianapolis to St. Louis in December is currently the most expensive (average of $279). 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Indianapolis to St. Louis

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

Discover the top airline 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$196Average$407FlexibilityNo cancel feeOn-time71%

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