$122+ Cheap flights from Indianapolis to St. Louis (IND - STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
IND — STL
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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Find cheap flights from Indianapolis 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 Indianapolis to St. Louis
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Best
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Cheapest flights from Indianapolis to St. LouisExplore 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 September 9, 2026.
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 September 9, 2026.
This Frontier deal was found by Cheapflights users on 9/7. 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 10/3011:25 am -
1 stop12h 51m
Sun 11/112:14 pm -
1 stop6h 48m
Deal found 9/7![Frontier logo]()
$244
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.
Thu 10/157:30 pm -
1 stop6h 05m
Mon 10/196:10 pm -
1 stop5h 05m
Deal found 9/9![Southwest logo]()
$257
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.
Wed 11/112:10 pm -
2 stops6h 15m
Sat 11/146:35 am -
1 stop7h 40m
Deal found 9/8![Southwest logo]()
$262
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.
Fri 10/26:45 am -
1 stop3h 15m
Sat 10/36:30 am -
1 stop7h 35m
Deal found 9/8![Southwest logo]()
$273
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:06 pm -
2 stops21h 34m
Mon 10/194:30 pm -
1 stop16h 56m
Deal found 9/9![Frontier logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 10/57:48 pm -
2 stops40h 44m
Mon 10/124:30 pm -
1 stop16h 56m
Deal found 9/7![Frontier logo]()
$311
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Fri 11/139:10 am -
1 stop4h 00m
Fri 11/136:50 pm -
1 stop4h 06m
Deal found 9/6![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 9/7. 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 10/306:45 pm -
1 stop6h 55m
Sun 11/14:40 pm -
2 stops6h 35m
Deal found 9/7![Southwest logo]()
$323
This Southwest deal was found by Cheapflights users on 9/5. 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 10/283:25 pm -
1 stop5h 35m
Wed 11/45:30 am -
2 stops9h 15m
Deal found 9/5![Southwest logo]()
$324
Best flights from Indianapolis to St. LouisDiscover carefully curated flight deals from Indianapolis to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
Discover carefully curated flight deals from Indianapolis to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
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.
Sat 1/307:20 am -
1 stop7h 50m
Tue 2/23:45 pm -
1 stop5h 00m
Deal found 9/8![Southwest logo]()
$257
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Fri 11/139:10 am -
1 stop4h 00m
Fri 11/136:50 pm -
1 stop4h 06m
Deal found 9/6![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 9/6. 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 11/137:15 am -
1 stop6h 30m
Fri 11/134:30 pm -
1 stop5h 05m
Deal found 9/6![Southwest logo]()
$319
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:46 pm -
1 stop6h 23m
Fri 10/308:30 am -
1 stop5h 30m
Deal found 9/8![United Airlines logo]()
$343
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.
Fri 10/26:45 pm -
1 stop6h 00m
Sun 10/45:50 pm -
1 stop4h 00m
Deal found 9/9![Southwest logo]()
$328
This Southwest deal was found by Cheapflights users on 9/5. 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 10/2811:00 am -
2 stops7h 45m
Wed 11/45:30 am -
2 stops9h 15m
Deal found 9/5![Southwest logo]()
$329
This Southwest deal was found by Cheapflights users on 9/6. 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.
Sun 10/46:45 am -
1 stop3h 40m
Sun 10/115:50 pm -
1 stop4h 00m
Deal found 9/6![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 9/7. 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 9/284:10 pm -
1 stop7h 25m
Thu 10/15:10 am -
1 stop7h 15m
Deal found 9/7![Southwest logo]()
$358
Last-minute flights from Indianapolis to St. LouisDiscover last-minute flight deals from Indianapolis to St. Louis. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from Indianapolis to St. Louis. Data last updated September 9, 2026 and is based on user searches.
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.
Fri 10/26:45 am -
1 stop3h 15m
Sat 10/36:30 am -
1 stop7h 35m
Deal found 9/8![Southwest logo]()
$273
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.
Fri 10/26:45 pm -
1 stop6h 00m
Sun 10/45:50 pm -
1 stop4h 00m
Deal found 9/9![Southwest logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 10/57:48 pm -
2 stops40h 44m
Mon 10/124:30 pm -
1 stop16h 56m
Deal found 9/7![Frontier logo]()
$311
This Southwest deal was found by Cheapflights users on 9/7. 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 10/56:45 pm -
1 stop5h 05m
Mon 10/125:00 am -
1 stop8h 25m
Deal found 9/7![Southwest logo]()
$319
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.
Thu 10/157:30 pm -
1 stop6h 05m
Mon 10/196:10 pm -
1 stop5h 05m
Deal found 9/9![Southwest logo]()
$257
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:06 pm -
2 stops21h 34m
Mon 10/194:30 pm -
1 stop16h 56m
Deal found 9/9![Frontier logo]()
$275
This Southwest deal was found by Cheapflights users on 9/5. 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 10/283:25 pm -
1 stop5h 35m
Wed 11/45:30 am -
2 stops9h 15m
Deal found 9/5![Southwest logo]()
$324
This Frontier deal was found by Cheapflights users on 9/7. 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 10/3011:25 am -
1 stop12h 51m
Sun 11/112:14 pm -
1 stop6h 48m
Deal found 9/7![Frontier logo]()
$244
This Southwest deal was found by Cheapflights users on 9/7. 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 10/306:45 pm -
1 stop6h 55m
Sun 11/14:40 pm -
2 stops6h 35m
Deal found 9/7![Southwest logo]()
$323
One-way flights from Indianapolis to St. LouisSearch for one-way flight options from Indianapolis to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
Search for one-way flight options from Indianapolis to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/812:56 pm -
2 stops29h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$122
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:35 am -
1 stop3h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Delta logo]()
$129
This Frontier deal was found by Cheapflights users on 9/6. 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 11/1311:25 am -
1 stop12h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$130
This CheapOair deal was found by Cheapflights users on 9/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:56 pm -
1 stop23h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$131
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:26 am -
1 stop6h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$150
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:21 am -
1 stop6h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$160
This Southwest deal was found by Cheapflights users on 9/6. 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 11/131:05 pm -
2 stops7h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Southwest logo]()
$165
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:21 am -
2 stops26h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$177
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 9/227:00 am -
1 stop6h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Southwest logo]()
$224
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 September 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $244 (Frontier) |
One-way from | $122 (Kiwi.com) |
Popular in | November |
Cheapest in | January |
Average price | $422 |
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 7,457,451 searches. Data last updated September 9, 2026.
Use the filters below to find and compare flights from Indianapolis to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Thu 10/1
6:35 am-9:29 am
1 stop3h 54m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$129
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Thu 10/1
8:56 pm-7:17 pm
1 stop23h 21m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$131
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Fri 11/13
6:55 pm-12:30 am
1 stop6h 35m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
Quickest round-trip
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Thu 10/8
6:45 am-9:00 am
1 stop3h 15m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$160
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Sat 1/30
7:20 am-2:10 pm
1 stop7h 50m
Lambert-St Louis
Tue 2/2
3:45 pm-9:45 pm
1 stop5h 00m
$257
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Fri 11/13
9:10 am-12:10 pm
1 stop4h 00m
Lambert-St Louis
Fri 11/13
6:50 pm-11:56 pm
1 stop4h 06m
$319
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Fri 11/13
7:15 am-12:45 pm
1 stop6h 30m
Lambert-St Louis
Fri 11/13
4:30 pm-10:35 pm
1 stop5h 05m
$319
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Fri 10/2
6:45 pm-11:45 pm
1 stop6h 00m
Lambert-St Louis
Sun 10/4
5:50 pm-10:50 pm
1 stop4h 00m
$328
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Wed 10/28
11:00 am-5:45 pm
2 stops7h 45m
Lambert-St Louis
Wed 11/4
5:30 am-3:45 pm
2 stops9h 15m
$329
IndianapolisSt. Louis
IND Indianapolis - STL Lambert-St Louis
INDSTL
Indianapolis
Thu 10/29
12:46 pm-6:09 pm
1 stop6h 23m
Lambert-St Louis
Fri 10/30
8:30 am-3:00 pm
1 stop5h 30m
$343
Showing 1-10 of 12 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Indianapolis-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Indianapolis-St. Louis flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
IND-STL
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.
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 September 9, 2026.
Peruse reviews from past customers who have flown with United 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.
Comfort
7.3
Crew
8.1
Food
6.6
Boarding
7.7
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Crew
8.1
Food
6.6
Boarding
7.7
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Edwardsville
Glencoe
Chesterfield
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Indianapolis and St. Louis flights
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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 7,457,451 searches. Data last updated September 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$265 | Average$340 | FlexibilityNo cancel fee | On-time69% |