St. Louis

$69+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
May 31 — Jun 71
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Cheap 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 May 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:12 pm
CVG
-
STL
1 stop21h 43m
Frontier
Tue 6/26:33 pm
STL
-
CVG
1 stop16h 08m
Frontier
Deal found 4/28$126
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2412:12 pm
CVG
-
STL
1 stop21h 43m
Frontier
Mon 5/255:27 pm
STL
-
CVG
1 stop16h 37m
Frontier
Deal found 4/27$136
This Frontier deal was found by Cheapflights users on 4/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3112:12 pm
CVG
-
STL
1 stop6h 21m
Frontier
Wed 6/34:19 pm
STL
-
CVG
1 stop6h 19m
Frontier
Deal found 4/28$180
This Frontier deal was found by Cheapflights users on 4/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:40 pm
CVG
-
STL
1 stop24h 43m
Frontier
Mon 5/184:19 pm
STL
-
CVG
1 stop6h 36m
Frontier
Deal found 4/28$181
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/257:49 pm
CVG
-
STL
1 stop22h 44m
Frontier
Mon 6/15:27 pm
STL
-
CVG
1 stop16h 37m
Frontier
Deal found 4/27$187
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 6/512:26 pm
IND
-
STL
2 stops21h 29m
Multiple Airlines
Tue 6/96:31 pm
STL
-
IND
1 stop15h 48m
Multiple Airlines
Deal found 4/30$203
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:36 pm
CVG
-
STL
1 stop23h 47m
Frontier
Mon 6/18:08 pm
STL
-
CVG
1 stop22h 33m
Frontier
Deal found 4/27$205
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1712:12 pm
CVG
-
STL
1 stop21h 43m
Frontier
Mon 6/15:27 pm
STL
-
CVG
1 stop16h 37m
Frontier
Deal found 4/27$210
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:00 am
CVG
-
STL
1 stop17h 57m
Frontier
Wed 6/35:27 pm
STL
-
CVG
1 stop16h 37m
Frontier
Deal found 4/29$214
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 6/512:14 pm
IND
-
STL
1 stop21h 41m
Frontier
Tue 6/96:31 pm
STL
-
IND
1 stop15h 48m
Frontier
Deal found 4/30$215
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 6/512:46 pm
CVG
-
STL
1 stop21h 09m
Frontier
Fri 6/128:08 pm
STL
-
CVG
2 stops14h 39m
Frontier
Deal found 4/26$221
This Frontier deal was found by Cheapflights users on 4/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:11 pm
ORD
-
STL
1 stop6h 46m
Frontier
Sat 5/304:19 pm
STL
-
ORD
1 stop6h 54m
Frontier
Deal found 4/27$222

Find 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 May 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$126
(Kiwi.com)

One-way from

$69
(Southwest)

Popular in

September

Cheapest in

November

Average price

$399
Provider with most accurate pricing for Indianapolis-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for Indianapolis-Lambert-St Louis flights.
From Indiana to Lambert-St Louis
One-way flight from Indiana to Lambert-St Louis
Highest demand for flights based on searches. 15% potential increase in price ($66 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Average for round-trip flights in May 2026

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 May 1, 2026.
Use the filters below to find and compare flights from Indiana to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Fri 6/5

12:14 pm-8:55 am

1 stop21h 41m

Lambert-St Louis

Tue 6/9

6:31 pm-11:19 am

1 stop15h 48m

$215

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 5/19

7:00 am-4:46 pm

2 stops9h 46m

Lambert-St Louis

Thu 5/21

9:13 am-4:56 pm

1 stop7h 43m

$223

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 6/12

6:35 am-12:34 pm

1 stop5h 59m

Lambert-St Louis

Tue 6/16

7:08 am-12:36 pm

1 stop5h 28m

$257

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 6/2

11:35 am-5:55 pm

2 stops6h 20m

Lambert-St Louis

Wed 6/3

11:30 am-3:05 pm

1 stop3h 35m

$259

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 9/15

2:20 pm-5:55 pm

1 stop3h 35m

Lambert-St Louis

Sat 9/19

7:50 am-1:20 pm

2 stops5h 30m

$262

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Fri 5/22

9:22 am-1:10 pm

1 stop3h 48m

Lambert-St Louis

Tue 5/26

7:05 am-11:56 am

1 stop4h 51m

$268

DaytonSt. Louis

DAY - STL

DAYSTL

Dayton

Tue 10/6

2:55 pm-8:49 pm

1 stop6h 54m

Lambert-St Louis

Tue 10/13

3:42 pm-11:14 pm

1 stop6h 32m

$271

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 5/28

1:30 pm-6:50 pm

1 stop5h 20m

Lambert-St Louis

Sun 5/31

2:10 pm-3:20 pm

Nonstop1h 10m

$274

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Tue 6/9

6:33 pm-9:16 pm

1 stop3h 43m

Lambert-St Louis

Wed 6/10

6:00 am-10:28 am

1 stop3h 28m

$275

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 5/20

9:28 am-12:47 pm

1 stop4h 19m

Lambert-St Louis

Wed 6/24

6:00 am-10:28 am

1 stop3h 28m

$275

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 60 resultsSorted by cheapest first
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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, November is the cheapest month in which you can book a flight from Indiana to St. Louis (average of $156). Flying from Indiana to St. Louis in October is currently the most expensive (average of $275). 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.

How much does it cost to fly round-trip from Indiana to St. Louis?

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 $248, Frontier can have you in St. Louis from Indiana in 1h 15m. There are 251 mi between Indiana and St. Louis. This flight may include one or multiple stops.

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

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $98. Users have also found prices from $123 and $228 on Southwest and United Airlines, respectively.

  • What are the most popular routes 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, November is the cheapest month in which you can book a flight from Indiana to St. Louis (average of $156). Flying from Indiana to St. Louis in October is currently the most expensive (average of $275). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
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.

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 May 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$218Average$258FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$228Average$268FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$353FlexibilityNo cancel feeOn-time69%

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