Cheap flights from Chicago O'Hare Intl Airport to St. Louis from £44
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
21 Oct — 28 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago O'Hare Intl to Lambert-St Louis are usually found in December or October, booked 78 days in advance, depart on a Tuesday or Monday and return on a Wednesday
Cheap flight deals from O'Hare Intl to St. Louis
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
Cheapest flights from O'Hare Intl to St. Louis
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 21 September 2026.
Sat 10/1012:30 -
1 stop4h 08m
Mon 12/1014:38 -
1 stop3h 51m
Deal found 18/9£117
Fri 16/1010:40 -
Nonstop1h 33m
Fri 23/1008:00 -
Nonstop1h 31m
Deal found 17/9£128
Sat 24/1011:19 -
1 stop4h 18m
Sat 7/1116:22 -
1 stop4h 08m
Deal found 21/9£146
Sat 24/1010:40 -
Nonstop1h 35m
Sat 7/1108:30 -
Nonstop1h 34m
Deal found 21/9£152
Sat 10/1014:12 -
Nonstop1h 31m
Mon 12/1008:00 -
Nonstop1h 31m
Deal found 18/9£154
Fri 23/1007:00 -
1 stop6h 53m
Sat 7/1110:35 -
1 stop5h 51m
Deal found 21/9£156
Thu 15/1008:26 -
1 stop14h 47m
Mon 19/1017:53 -
1 stop6h 38m
Deal found 20/9£160
Fri 23/1012:45 -
Nonstop1h 32m
Sat 7/1107:30 -
Nonstop1h 30m
Deal found 21/9£172
Tue 13/1014:12 -
Nonstop1h 31m
Sat 24/1013:25 -
Nonstop1h 35m
Deal found 17/9£181
Thu 5/1109:51 -
1 stop13h 25m
Thu 12/1112:14 -
1 stop6h 54m
Deal found 21/9£186
Sun 1/1110:45 -
Nonstop1h 25m
Tue 3/1108:30 -
Nonstop1h 34m
Deal found 20/9£188
Best flights from O'Hare Intl to St. Louis
Discover carefully curated flight deals from O'Hare Intl to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.
Sat 10/1012:30 -
1 stop4h 08m
Mon 12/1014:38 -
1 stop3h 51m
Deal found 19/9£117
Sat 10/1017:29 -
Nonstop1h 31m
Mon 12/1017:36 -
Nonstop1h 29m
Deal found 19/9£155
Tue 3/1106:20 -
1 stop4h 18m
Tue 10/1115:30 -
1 stop6h 03m
Deal found 19/9£117
Wed 14/1007:00 -
1 stop6h 53m
Wed 21/1010:35 -
1 stop5h 57m
Deal found 20/9£117
Tue 27/1010:45 -
Nonstop1h 25m
Tue 27/1018:50 -
Nonstop1h 29m
Deal found 16/9£181
Sun 1/1110:45 -
Nonstop1h 25m
Tue 3/1108:30 -
Nonstop1h 34m
Deal found 20/9£188
Sat 16/109:30 -
1 stop6h 29m
Tue 26/117:30 -
1 stop4h 07m
Deal found 16/9£196
Tue 27/1006:20 -
1 stop5h 48m
Tue 27/1017:35 -
1 stop3h 52m
Deal found 16/9£196
Direct flights from O'Hare Intl to St. Louis
Explore direct flight options from O'Hare Intl to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 September 2026.
Fri 16/1010:40 -
Nonstop1h 33m
Fri 23/1008:00 -
Nonstop1h 31m
Deal found 17/9£128
Sat 24/1010:40 -
Nonstop1h 35m
Sat 7/1108:30 -
Nonstop1h 34m
Deal found 21/9£152
Sat 10/1014:12 -
Nonstop1h 31m
Mon 12/1008:00 -
Nonstop1h 31m
Deal found 18/9£154
Fri 23/1012:45 -
Nonstop1h 32m
Sat 7/1107:30 -
Nonstop1h 30m
Deal found 21/9£172
Tue 13/1014:12 -
Nonstop1h 31m
Sat 24/1013:25 -
Nonstop1h 35m
Deal found 17/9£181
Sun 1/1110:45 -
Nonstop1h 25m
Tue 3/1108:30 -
Nonstop1h 34m
Deal found 20/9£188
Thu 8/1012:45 -
Nonstop1h 32m
Sat 10/1010:27 -
Nonstop1h 32m
Deal found 16/9£195
Fri 23/1014:12 -
Nonstop1h 31m
Sat 24/1008:00 -
Nonstop1h 31m
Deal found 17/9£208
Sat 10/1016:10 -
Nonstop1h 31m
Wed 14/1013:29 -
Nonstop1h 31m
Deal found 17/9£234
Mon 19/1019:50 -
Nonstop1h 31m
Wed 21/1006:00 -
Nonstop1h 36m
Deal found 17/9£234
Sat 7/1115:30 -
Nonstop1h 29m
Sun 8/1117:28 -
Nonstop1h 32m
Deal found 16/9£235
Last-minute flights from O'Hare Intl to St. Louis
Discover last-minute flight deals from O'Hare Intl to St. Louis. Data last updated 21 September 2026 and is based on user searches.
Thu 8/1012:45 -
Nonstop1h 32m
Sat 10/1010:27 -
Nonstop1h 32m
Deal found 16/9£195
Sat 10/1012:30 -
1 stop4h 08m
Mon 12/1014:38 -
1 stop3h 51m
Deal found 18/9£117
Sat 10/1014:12 -
Nonstop1h 31m
Mon 12/1008:00 -
Nonstop1h 31m
Deal found 18/9£154
Tue 13/1014:12 -
Nonstop1h 31m
Sat 24/1013:25 -
Nonstop1h 35m
Deal found 17/9£181
Thu 15/1008:26 -
1 stop14h 47m
Mon 19/1017:53 -
1 stop6h 38m
Deal found 20/9£160
Fri 16/1010:40 -
Nonstop1h 33m
Fri 23/1008:00 -
Nonstop1h 31m
Deal found 17/9£128
Sat 17/1011:09 -
1 stop4h 28m
Tue 20/1012:28 -
1 stop4h 12m
Deal found 16/9£196
Fri 23/1007:00 -
1 stop6h 53m
Sat 7/1110:35 -
1 stop5h 51m
Deal found 21/9£156
Fri 23/1012:45 -
Nonstop1h 32m
Sat 7/1107:30 -
Nonstop1h 30m
Deal found 21/9£172
Sat 24/1011:19 -
1 stop4h 18m
Sat 7/1116:22 -
1 stop4h 08m
Deal found 21/9£146
Sat 24/1010:40 -
Nonstop1h 35m
Sat 7/1108:30 -
Nonstop1h 34m
Deal found 21/9£152
One-way flights from O'Hare Intl to St. Louis
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 21 September 2026.
Thu 26/1114:12 -
Nonstop1h 31m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 20/9£44
Wed 13/117:20 -
1 stop5h 58m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 21/9£59
Fri 23/1014:12 -
Nonstop1h 31m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 19/9£64
Fri 6/1109:59 -
1 stop6h 44m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 18/9£72
Wed 21/1010:40 -
Nonstop1h 33m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 21/9£78
Tue 27/1014:12 -
Nonstop1h 31m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 17/9£91
Fri 16/1010:40 -
Nonstop1h 33m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 18/9£98
Thu 8/1012:45 -
Nonstop1h 32m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/9£105
Tue 17/1107:05 -
1 stop6h 18m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 17/9£109
Mon 21/1210:30 -
1 stop6h 56m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 21/9£112
Wed 14/1012:45 -
Nonstop1h 32m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 17/9£117
Fri 9/1012:45 -
Nonstop1h 32m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 17/9£118
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 21 September 2026.
Customise 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 21 September 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
Price
Cheapest return flight
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Tue 17/11
14:44-20:29
1 stop5h 45m
Lambert-St Louis
Wed 31/12
00:00-00:00
Nonstop0h 00m
£59
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Tue 20/10
13:55-20:51
1 stop6h 56m
Lambert-St Louis
Wed 31/12
00:00-00:00
Nonstop0h 00m
£59
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Fri 8/1
17:20-23:18
1 stop5h 58m
Lambert-St Louis
Wed 31/12
00:00-00:00
Nonstop0h 00m
£72
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Wed 18/11
20:10-21:40
Nonstop1h 30m
Lambert-St Louis
Wed 31/12
00:00-00:00
Nonstop0h 00m
£78
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Wed 7/10
10:40-12:13
Nonstop1h 33m
Lambert-St Louis
Wed 31/12
00:00-00:00
Nonstop0h 00m
£91
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Sat 17/10
19:50-21:21
Nonstop1h 31m
Lambert-St Louis
Wed 31/12
00:00-00:00
Nonstop0h 00m
£91
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Thu 8/10
12:45-14:17
Nonstop1h 32m
Lambert-St Louis
Wed 31/12
00:00-00:00
Nonstop0h 00m
£105
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Sat 10/10
12:30-16:38
1 stop4h 08m
Lambert-St Louis
Mon 12/10
14:38-18:29
1 stop3h 51m
£117
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Tue 3/11
06:20-10:38
1 stop4h 18m
Lambert-St Louis
Tue 10/11
15:30-21:33
1 stop6h 03m
£117
ChicagoSt. Louis
ORD Chicago O'Hare Intl - STL Lambert-St Louis
ORDSTL
Chicago O'Hare Intl
Wed 14/10
07:00-13:53
1 stop6h 53m
Lambert-St Louis
Wed 21/10
10:35-16:32
1 stop5h 57m
£117
Flights are sorted by cheapest return flights first.
Deals found on 20/9
Showing 1-10 of 19 resultsSorted by cheapest first
1
2
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 return 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
Airlines
Delays
How far ahead should I book a flight from Chicago O'Hare Intl Airport to St. Louis?
Booking 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago O'Hare Intl Airport to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 £159). Flying from Chicago O'Hare Intl Airport to St. Louis in May is currently the most expensive (average of £471). 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 21 September 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 87% on flights from Chicago O'Hare Intl Airport to St. Louis by exploring options for tickets in the evening.
How much does it cost for a return flight from Chicago O'Hare Intl Airport to St. Louis?
Airfare is below average for this route at the moment.
Chicago O'Hare Intl Airport to St. Louis flights typically cost between £178 and £375 in October.The cheapest return price found within the last 5 days was £117 on Delta (10 Oct–12 Oct).
Weekly flight availability from Chicago O'Hare Intl Airport to St. Louis
Explore weekly flight availability from O'Hare Intl to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 21 September 2026.
The most flights from ORD to STL are scheduled on a Sunday (62 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (27 on average).
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 past year, United Airlines have had the lowest number of delays on this route, with just 20% of flights being delayed.
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.
What airport do you fly into for flights to St. Louis from Chicago O'Hare Intl?
Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Chicago O'Hare Intl. Booking flights from Chicago O'Hare Intl to Lambert-St Louis (STL) should be relatively easy as there are 45 daily inbound flights from Chicago O'Hare Intl from 0 different airlines.
How long is the flight from Chicago O'Hare Intl Airport to St. Louis?
A quick flight from Chicago O'Hare Intl Airport to St. Louis can take about 4h 08m. Delta provides one of the quickest options available for as low as £117. The distance from Chicago O'Hare Intl Airport to St. Louis is about 258 mi.
What are the most reliable airlines from Chicago O'Hare Intl Airport to St. Louis?
The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to St. Louis are Republic Airways (82%), SkyWest Airlines (79%) and United Airlines (74%).
Can I find deals for flights from O'Hare Intl to St. Louis that include hotel bookings?
Yes. In addition to deals on O'Hare Intl to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from O'Hare Intl to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to St. Louis.
Can I find deals for business class flights from O'Hare Intl to St. Louis?
Yes. Cheapflights offers flight deals from O'Hare Intl 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 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 £159). Flying from Chicago O'Hare Intl Airport to St. Louis in May is currently the most expensive (average of £471). 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.
Browse through other flights departing from O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on 21 September 2026.
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 21 September 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from O'Hare Intl to St. Louis?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to St. Louis from O'Hare Intl today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to St. Louis?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from O'Hare Intl to St. Louis for you. Better yet — we are completely free to use.
Can Cheapflights find flights from O'Hare Intl to St. Louis with no change fees?
Yes! Cheapflights helps users easily find flights from O'Hare Intl to St. Louis with no change fees.
Can Cheapflights notify me if prices for flights from O'Hare Intl to St. Louis become cheaper?
Not ready to book yet? You can track prices for flights from O'Hare Intl to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.
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