HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$46+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Indiana to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 3, 2025.

Round-trip from

$91
(Southwest)

One-way from

$46
(Southwest)

Popular in

January

Cheapest in

April

Average price

$386
From Indiana to Lambert-St Louis
Search Deals
One-way flight from Indiana to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 3, 2025.

This Southwest deal was found by Cheapflights users on 7/2. 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 8/511:25 amMDW - STL
Nonstop1h 10mSouthwest
Wed 8/68:40 amSTL - MDW
Nonstop1h 10mSouthwest
Deal found 7/2$91
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Tue 8/129:20 pmORD - STL
Nonstop1h 25mUnited Airlines
Tue 8/195:30 pmSTL - ORD
Nonstop1h 25mUnited Airlines
Deal found 7/2$91
This American Airlines deal was found by Cheapflights users on 7/2. 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 8/1610:08 pmORD - STL
Nonstop1h 16mAmerican Airlines
Sat 8/234:19 pmSTL - ORD
Nonstop1h 26mAmerican Airlines
Deal found 7/2$92
This Southwest deal was found by Cheapflights users on 7/1. 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 8/162:55 pmORD - STL
1 stop5h 35mSouthwest
Mon 8/187:15 amSTL - ORD
1 stop8h 05mSouthwest
Deal found 7/1$114
This Jettzy deal was found by Cheapflights users on 7/1. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/138:15 amORD - STL
1 stop3h 55mSouthern / Mokulele
Wed 8/201:00 pmSTL - ORD
1 stop18h 37mSouthern / Mokulele
Deal found 7/1$165
This Delta deal was found by Cheapflights users on 7/2. 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.
Sat 8/167:17 pmMDW - STL
1 stop4h 05mDelta
Sat 8/238:46 amSTL - MDW
1 stop4h 17mDelta
Deal found 7/2$177
This Southwest deal was found by Cheapflights users on 7/2. 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.
Thu 9/184:35 pmCVG - STL
1 stop7h 50mSouthwest
Tue 9/237:00 amSTL - CVG
1 stop4h 25mSouthwest
Deal found 7/2$177
This Delta deal was found by Cheapflights users on 7/2. 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.
Sat 8/26:00 amORD - STL
1 stop4h 33mDelta
Mon 8/45:37 pmSTL - ORD
1 stop3h 57mDelta
Deal found 7/2$177
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1312:30 pmIND - STL
1 stop4h 17mUnited Airlines
Mon 8/185:30 pmSTL - IND
1 stop4h 58mUnited Airlines
Deal found 6/30$177
This Expedia deal was found by Cheapflights users on 7/2. 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 8/22:23 pmORD - STL
Nonstop1h 24mMultiple Airlines
Mon 8/41:00 pmSTL - ORD
1 stop3h 32mMultiple Airlines
Deal found 7/2$179
This Southwest deal was found by Cheapflights users on 7/1. 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.
Mon 9/155:45 pmIND - STL
1 stop6h 40mSouthwest
Wed 9/1711:10 amSTL - IND
2 stops8h 05mSouthwest
Deal found 7/1$182
This American Airlines deal was found by Cheapflights users on 7/2. 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 12/67:12 pmSDF - STL
1 stop3h 35mAmerican Airlines
Wed 12/105:58 amSTL - SDF
1 stop10h 14mAmerican Airlines
Deal found 7/2$201

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 July 3, 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

MDW - STL

MDWSTL

Chicago Midway

Tue 8/5

11:25 am-12:35 pm

Nonstop1h 10m

Lambert-St Louis

Wed 8/6

8:40 am-9:50 am

Nonstop1h 10m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 8/12

9:20 pm-10:45 pm

Nonstop1h 25m

Lambert-St Louis

Tue 8/19

5:30 pm-6:55 pm

Nonstop1h 25m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/16

10:08 pm-11:24 pm

Nonstop1h 16m

Lambert-St Louis

Sat 8/23

4:19 pm-5:45 pm

Nonstop1h 26m

$92

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/16

2:55 pm-8:30 pm

1 stop5h 35m

Lambert-St Louis

Mon 8/18

7:15 am-3:20 pm

1 stop8h 05m

$114

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 8/13

8:15 am-12:10 pm

1 stop3h 55m

Lambert-St Louis

Wed 8/20

1:00 pm-7:37 am

1 stop18h 37m

$165

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sat 8/16

6:17 pm-9:55 pm

1 stop3h 38m

Lambert-St Louis

Sat 8/23

6:40 am-12:28 pm

1 stop5h 48m

$177

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/2

6:00 am-10:33 am

1 stop4h 33m

Lambert-St Louis

Mon 8/4

5:37 pm-9:34 pm

1 stop3h 57m

$177

IndianapolisSt. Louis

IND - STL

INDSTL

Indianapolis

Wed 8/13

12:30 pm-3:47 pm

1 stop4h 17m

Lambert-St Louis

Mon 8/18

5:30 pm-11:28 pm

1 stop4h 58m

$177

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 9/18

4:35 pm-11:25 pm

1 stop7h 50m

Lambert-St Louis

Tue 9/23

7:00 am-12:25 pm

1 stop4h 25m

$177

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/2

2:23 pm-3:47 pm

Nonstop1h 24m

Lambert-St Louis

Mon 8/4

1:00 pm-4:32 pm

1 stop3h 32m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 60 results
1
2
3
...
6

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 July 3, 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.

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 July 3, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Indiana to St. Louis by reading reviews from past customers. 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
4,270 reviews

Entertainment

7.6

Food

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

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
4,270 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Food

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

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
7,970 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Food

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

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
8,845 reviews
Southwest
8.0
Very good
4,270 reviews

Entertainment

7.6

Food

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

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
4,270 reviews

Entertainment

7.6

Food

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

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 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.

  • 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 $46. Users have also found prices from $46 and $49 on United Airlines and American Airlines, 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 Cincinnati Cinci./N. Kentucky - 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 Indiana?

Book flights to Indiana if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Festus
Chesterfield
Farmington

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Indiana to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Newark to St. Louis flights
LaGuardia to St. Louis flights
Los Angeles to St. Louis flights
John F Kennedy Intl to St. Louis flights
Dulles Intl to St. Louis flights
John F Kennedy Intl to Kansas City flights
Newark to Kansas City flights
Baltimore to St. Louis flights
Dallas/Fort Worth to St. Louis flights
Dulles Intl to Kansas City flights
LaGuardia to Kansas City flights
Seattle to St. Louis flights
Hobby to St. Louis flights
Boston to St. Louis flights
Denver to St. Louis flights
Denver to Kansas City flights
Boston to Kansas City flights
Atlanta to St. Louis flights
San Francisco to St. Louis flights
Seattle to Kansas City flights
George Bush Intcntl to St. Louis flights
O'Hare Intl to Kansas City flights
Los Angeles to Kansas City flights
Hobby to Kansas City flights
Atlanta to Kansas City flights
Denver to Springfield flights
Reagan-National to St. Louis flights
Philadelphia to St. Louis flights
Ontario to St. Louis flights
O'Hare Intl to St. Louis flights
George Bush Intcntl to Kansas City flights
Sky Harbor Intl to St. Louis flights
Minneapolis to St. Louis flights
Orlando to St. Louis flights
Baltimore to Kansas City flights
Minneapolis to Kansas City flights
Sacramento to Kansas City flights
Salt Lake City to Kansas City flights
Philadelphia to Kansas City flights
Sky Harbor Intl to Kansas City flights
Salt Lake City to St. Louis flights
Dallas/Fort Worth to Kansas City flights
Raleigh to St. Louis flights
Spokane to St. Louis flights
Detroit to Kansas City flights
Ontario to Kansas City flights
Portland to Kansas City flights
Reagan-National to Kansas City flights
Orlando to Kansas City flights
San Francisco to Kansas City flights

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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$198Average$315FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$198Average$322FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$216Average$353FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights