$59+ Cheap flights from O'Hare Intl (ORD) to St. Louis (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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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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
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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 O'Hare Intl to St. Louis
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Cheapest flights from O'Hare Intl to St. LouisExplore the most affordable flight options available from O'Hare Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.
Explore the most affordable flight options available from O'Hare Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:00 am -
1 stop28h 06m
Fri 12/412:02 pm -
1 stop6h 01m
Deal found 10/29![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:12 pm -
1 stop6h 47m
Thu 12/36:13 pm -
1 stop6h 46m
Deal found 10/29![Frontier logo]()
$180
This Kissandfly.com deal was found by Cheapflights users on 10/25. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1910:39 pm -
Nonstop1h 22m
Mon 11/233:04 pm -
1 stop9h 49m
Deal found 10/25![Frontier logo]()
$183
This Trip.com deal was found by Cheapflights users on 10/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:30 am -
1 stop12h 44m
Mon 11/167:59 pm -
1 stop28h 22m
Deal found 10/26![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 11/146:30 am -
1 stop12h 44m
Thu 11/197:24 pm -
1 stop4h 49m
Deal found 10/28![Frontier logo]()
$187
This CheapOair deal was found by Cheapflights users on 10/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:40 am -
1 stop18h 19m
Tue 12/16:13 pm -
1 stop6h 46m
Deal found 10/27![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 11/146:30 am -
1 stop12h 44m
Sat 11/213:04 pm -
1 stop9h 49m
Deal found 10/28![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Wed 12/23:55 pm -
2 stops32h 17m
Fri 12/412:02 pm -
1 stop6h 01m
Deal found 10/30![Frontier logo]()
$194
This American Airlines deal was found by Cheapflights users on 10/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:40 pm -
Nonstop1h 24m
Sun 11/228:12 pm -
Nonstop1h 36m
Deal found 10/30![American Airlines logo]()
$203
Best flights from O'Hare Intl to St. LouisDiscover carefully curated flight deals from O'Hare Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
Discover carefully curated flight deals from O'Hare Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/56:00 am -
1 stop16h 45m
Sat 2/66:20 am -
1 stop6h 55m
Deal found 10/27![Delta logo]()
$190
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 11/2010:45 am -
Nonstop1h 25m
Mon 11/236:00 am -
Nonstop1h 36m
Deal found 10/30![United Airlines logo]()
$208
This KAYAK deal was found by Cheapflights users on 10/27. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/145:33 pm -
1 stop5h 53m
Tue 12/153:32 pm -
1 stop6h 03m
Deal found 10/27![Delta logo]()
$231
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/253:30 pm -
Nonstop1h 29m
Sun 11/297:30 am -
Nonstop1h 30m
Deal found 10/25![United Airlines logo]()
$262
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/263:47 pm -
1 stop3h 44m
Fri 11/2710:20 am -
1 stop3h 39m
Deal found 10/26![Delta logo]()
$258
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/309:00 am -
Nonstop1h 42m
Sat 1/29:35 am -
Nonstop1h 43m
Deal found 10/25![United Airlines logo]()
$262
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/205:42 pm -
1 stop5h 40m
Mon 11/236:13 am -
2 stops7h 46m
Deal found 10/30![Delta logo]()
$262
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:23 am -
1 stop5h 58m
Tue 11/179:45 am -
1 stop6h 56m
Deal found 10/27![Delta logo]()
$343
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/247:00 am -
2 stops10h 05m
Mon 1/256:20 am -
1 stop6h 44m
Deal found 10/27![Delta logo]()
$356
Last-minute flights from O'Hare Intl to St. LouisDiscover last-minute flight deals from O'Hare Intl to St. Louis. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to St. Louis. Data last updated October 30, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 10/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:30 am -
1 stop12h 44m
Mon 11/167:59 pm -
1 stop28h 22m
Deal found 10/26![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 11/146:30 am -
1 stop12h 44m
Thu 11/197:24 pm -
1 stop4h 49m
Deal found 10/28![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Sat 11/146:30 am -
1 stop12h 44m
Sat 11/213:04 pm -
1 stop9h 49m
Deal found 10/28![Frontier logo]()
$190
This Kissandfly.com deal was found by Cheapflights users on 10/25. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1910:39 pm -
Nonstop1h 22m
Mon 11/233:04 pm -
1 stop9h 49m
Deal found 10/25![Frontier logo]()
$183
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:10 pm -
Nonstop1h 30m
Mon 11/238:30 am -
Nonstop1h 34m
Deal found 10/26![United Airlines logo]()
$206
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 11/2010:45 am -
Nonstop1h 25m
Mon 11/236:00 am -
Nonstop1h 36m
Deal found 10/30![United Airlines logo]()
$208
This American Airlines deal was found by Cheapflights users on 10/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:40 pm -
Nonstop1h 24m
Sun 11/228:12 pm -
Nonstop1h 36m
Deal found 10/30![American Airlines logo]()
$203
This CheapOair deal was found by Cheapflights users on 10/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:40 am -
1 stop18h 19m
Tue 12/16:13 pm -
1 stop6h 46m
Deal found 10/27![Frontier logo]()
$189
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:12 pm -
1 stop6h 47m
Thu 12/36:13 pm -
1 stop6h 46m
Deal found 10/29![Frontier logo]()
$180
One-way flights from O'Hare Intl to St. LouisSearch for one-way flight options from O'Hare Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
Search for one-way flight options from O'Hare Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This American Airlines deal was found by Cheapflights users on 10/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1610:39 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![American Airlines logo]()
$59
This Expedia deal was found by Cheapflights users on 10/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/107:25 am -
1 stop27h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Frontier logo]()
$65
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/139:58 am -
1 stop4h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Delta logo]()
$79
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:25 am -
1 stop27h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$85
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:40 am -
1 stop6h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$94
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/44:40 pm -
Nonstop1h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![United Airlines logo]()
$102
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:30 pm -
Nonstop1h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![American Airlines logo]()
$104
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:35 am -
1 stop14h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$105
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/42:41 pm -
1 stop5h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Delta logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Tue 12/810:00 am -
2 stops25h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$115
Find flight deals from O'Hare Intl to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) 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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $179 (CheapOair) |
One-way from | $59 (American Airlines) |
Popular in | May |
Cheapest in | December |
Average price | $489 |
Good round-trip deal | $428 or less |
Good one-way deal | $220 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from O'Hare Intl 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 October 30, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Sat 12/12
6:20 am-11:00 am
1 stop4h 40m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Sun 12/6
10:52 am-12:22 pm
Nonstop1h 30m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Mon 11/16
2:44 pm-8:29 pm
1 stop5h 45m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$79
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Fri 12/4
4:40 pm-6:16 pm
Nonstop1h 36m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$102
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Fri 12/4
2:41 pm-8:32 pm
1 stop5h 51m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$113
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Tue 2/2
12:55 pm-2:28 pm
Nonstop1h 33m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$169
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Thu 12/31
10:30 am-9:41 pm
2 stops11h 11m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$177
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Fri 2/5
6:00 am-10:45 pm
1 stop16h 45m
Lambert-St Louis
Sat 2/6
6:20 am-1:15 pm
1 stop6h 55m
$190
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Sun 3/21
9:04 am-10:42 am
Nonstop1h 38m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$204
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Mon 4/5
9:30 pm-10:54 pm
Nonstop1h 24m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$204
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from O'Hare Intl 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 O'Hare Intl to St. Louis in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-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 Chicago O'Hare Intl Airport-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 O'Hare Intl to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from O'Hare Intl with our price prediction graph.
ORD-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.
Cheapflights Insights
Everything you need to know about your flight from Chicago O'Hare Intl Airport to St. Louis
Prices
Delays
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?
Currently, December is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to St. Louis (average of $213). Flying from Chicago O'Hare Intl Airport to St. Louis in May is currently the most expensive (average of $631). 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 ORD to STL?
Find hourly flight availability from O'Hare Intl 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 October 30, 2026.
It’s typically best to fly out from Chicago O'Hare Intl Airport to St. Louis at noon. Doing so could potentially save you 19% on the flight price compared to flying in the afternoon, which is usually more expensive.
What is the cheapest day to fly from Chicago O'Hare Intl Airport to St. Louis?
Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to St. Louis. Price data was last updated on October 24, 2026.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to St. Louis flight should consider departing on Saturday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Chicago to St. Louis delayed?
About 21% of weekly flights between Chicago and St. Louis have experienced delays in the past year, with the average delay time being 129 minutes.
What is the most punctual flight time for Chicago to St. Louis flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Chicago to St. Louis flights?
Over the last year, United Airlines have had the lowest number of delays on this route, with just 20% of flights being delayed.
The best insider tips for Chicago O'Hare Intl Airport to St. Louis flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to St. Louis trip
Our travel experts
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 October 30, 2026.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Chicago O'Hare Intl Airport 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
Food
6.7
Overall
7.3
Entertainment
7.1
Boarding
7.7
Crew
8.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Comfort
7.3
Food
6.7
Overall
7.3
Entertainment
7.1
Boarding
7.7
Crew
8.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Comfort
7.3
Food
6.7
Overall
7.3
Entertainment
7.1
Boarding
7.7
Crew
8.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl 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
Wentzville
Maryland Heights
Chesterfield
Collinsville
Edwardsville
Glencoe
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Top 2 airlines flying from O'Hare Intl to St. Louis
Discover the top 2 airlines that operate flights from O'Hare Intl 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 October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$396 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$203 | Average$506 | FlexibilityNo cancel fee | On-time69% |