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St. Louis

$51+ Cheap flights from Indiana to St. Louis (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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Indiana to St. Louis

Keep the following information in mind while searching for Indiana to St. Louis flight deals. Data was last updated September 11, 2025.

Round-trip from

$101
(Southwest)

One-way from

$51
(Southwest)

Popular in

July

Cheapest in

November

Average price

$366
From Indiana to Lambert-St Louis
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One-way flight from Indiana to Lambert-St Louis
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Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Indiana to St. Louis

Cheapest flights from Indiana to St. Louis
Explore the most affordable flight options available from Indiana to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/511:25 amMDW - STL
Nonstop1h 10mSouthwest
Sat 11/86:25 amSTL - MDW
Nonstop1h 10mSouthwest
Deal found 9/11$101
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 10/19:25 amORD - STL
Nonstop1h 24mUnited Airlines
Sat 10/48:00 amSTL - ORD
Nonstop1h 30mUnited Airlines
Deal found 9/11$101
This Southwest deal was found by Cheapflights users on 9/9. 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 10/113:50 pmMDW - STL
Nonstop1h 10mSouthwest
Mon 10/135:40 amSTL - MDW
Nonstop1h 10mSouthwest
Deal found 9/9$117
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/2110:34 pmORD - STL
Nonstop1h 20mAmerican Airlines
Fri 10/246:00 amSTL - ORD
Nonstop1h 23mAmerican Airlines
Deal found 9/10$117
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/48:00 amORD - STL
Nonstop1h 26mAmerican Airlines
Sun 10/56:05 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Deal found 9/10$118
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 10/18:31 pmORD - STL
Nonstop1h 22mAmerican Airlines
Thu 10/26:05 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Deal found 9/10$120
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 10/211:01 amORD - STL
Nonstop1h 27mUnited Airlines
Sun 10/59:20 amSTL - ORD
Nonstop1h 30mUnited Airlines
Deal found 9/11$133
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/11:10 pmMDW - STL
Nonstop1h 15mSouthwest
Sat 10/45:55 pmSTL - MDW
Nonstop1h 10mSouthwest
Deal found 9/11$134
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/310:42 amORD - STL
1 stop22h 24mFrontier
Sat 10/47:55 pmSTL - ORD
1 stop13h 42mFrontier
Deal found 9/10$134
This eDestinos deal was found by Cheapflights users on 9/10. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:20 amORD - STL
1 stop25h 46mFrontier
Thu 10/27:55 pmSTL - ORD
1 stop28h 04mFrontier
Deal found 9/10$139
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:20 amMDW - STL
1 stop8h 44mFrontier
Mon 9/294:00 pmSTL - MDW
1 stop7h 20mFrontier
Deal found 9/10$143
This Southwest deal was found by Cheapflights users on 9/8. 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 10/145:55 pmMDW - STL
Nonstop1h 15mSouthwest
Wed 10/155:05 pmSTL - MDW
Nonstop1h 05mSouthwest
Deal found 9/8$144

Cheapflights Fare Finder

 
Customize your flight search to find flights from Indiana 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 September 11, 2025.
Use the filters below to find and compare flights from Indiana to St. Louis that are best for you.

Fly from

Indiana

Fly to

St. Louis

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 11/5

2:23 pm-3:49 pm

Nonstop1h 26m

Lambert-St Louis

Sat 11/8

5:24 pm-6:47 pm

Nonstop1h 23m

$101

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 10/1

1:03 pm-2:27 pm

Nonstop1h 24m

Lambert-St Louis

Sat 10/4

5:28 pm-6:53 pm

Nonstop1h 25m

$101

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Mon 11/3

6:20 am-7:35 am

Nonstop1h 15m

Lambert-St Louis

Wed 11/5

7:00 am-8:10 am

Nonstop1h 10m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 10/22

6:53 pm-8:26 pm

Nonstop1h 33m

Lambert-St Louis

Fri 10/24

6:00 am-7:23 am

Nonstop1h 23m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 10/11

1:03 pm-2:27 pm

Nonstop1h 24m

Lambert-St Louis

Mon 10/13

5:28 pm-6:53 pm

Nonstop1h 25m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 11/14

1:00 pm-2:25 pm

Nonstop1h 25m

Lambert-St Louis

Fri 11/14

6:43 pm-8:13 pm

Nonstop1h 30m

$133

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 10/1

1:10 pm-2:25 pm

Nonstop1h 15m

Lambert-St Louis

Sat 10/4

5:55 pm-7:05 pm

Nonstop1h 10m

$134

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 10/2

1:10 pm-4:35 pm

1 stop3h 25m

Lambert-St Louis

Fri 10/3

9:20 am-4:19 pm

1 stop6h 59m

$150

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Sat 9/27

5:44 pm-3:04 pm

1 stop22h 20m

Lambert-St Louis

Mon 9/29

1:57 pm-12:57 am

1 stop10h 00m

$153

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Fri 10/3

9:48 am-8:37 pm

1 stop10h 49m

Lambert-St Louis

Mon 10/6

4:00 pm-11:41 pm

1 stop7h 41m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 60 results
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Best time to book a flight from Indiana to St. Louis

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

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

Currently, August is the cheapest month in which you can book a flight from Indiana to St. Louis (average of $311). Flying from Indiana 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 IN to STL?

Find hourly flight availability from Indiana 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 September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Indiana to St. Louis as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Indiana 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 airport do you fly into for flights to St. Louis from Indiana?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from Indiana to St. Louis.

  • How long is the flight from Indiana to St. Louis?

    For as low as $117, United Airlines can have you in St. Louis from Indiana in 1h 15m. There are 251 mi between Indiana and St. Louis. All flights are typically nonstop.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $51. Users have also found prices from $51 and $73 on United Airlines and Frontier, respectively.

  • What are the most popular routes from Indiana to St. Louis?

    Most travelers choose Chicago O'Hare Intl - Lambert-St Louis, Chicago Midway - Lambert-St Louis or Indianapolis - Lambert-St Louis when deciding on the best route from Indiana to St. Louis.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Indiana 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 Indiana to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Indiana to St. Louis (average of $311). Flying from Indiana 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
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 Indiana to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Indiana to St. Louis

Discover the top 3 airlines that operate flights from Indiana 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$198Average$302FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$213Average$341FlexibilityNo cancel feeOn-time69%
DeltaCheapest$218Average$359FlexibilityNo cancel feeOn-timeN/A

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