Cheap flights from St. Louis to Chicago O'Hare Intl Airport from £45
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ORD
27 Oct — 3 Nov1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Lambert-St Louis to Chicago O'Hare Intl are usually found in December or February, booked 37 days in advance, depart on a Wednesday or Friday and return on a Monday
Cheap flight deals from St. Louis to O'Hare Intl
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
Cheapest flights from St. Louis to O'Hare Intl
Explore the most affordable flight options available from St. Louis to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 September 2026.
Fri 16/1013:29 -
Nonstop1h 31m
Mon 9/1110:45 -
Nonstop1h 25m
Deal found 23/9£109
Thu 10/1214:17 -
1 stop5h 58m
Wed 13/109:30 -
1 stop5h 01m
Deal found 23/9£119
Thu 15/1006:00 -
Nonstop1h 36m
Mon 19/1019:50 -
Nonstop1h 31m
Deal found 24/9£122
Fri 23/1006:00 -
Nonstop1h 36m
Fri 30/1010:45 -
Nonstop1h 25m
Deal found 23/9£129
Wed 14/1010:35 -
1 stop5h 57m
Fri 16/1007:00 -
1 stop6h 53m
Deal found 23/9£131
Mon 2/1107:30 -
Nonstop1h 30m
Mon 2/1114:12 -
Nonstop1h 31m
Deal found 23/9£154
Mon 2/1117:29 -
Nonstop1h 36m
Tue 3/1118:03 -
Nonstop1h 19m
Deal found 23/9£156
Tue 10/1106:40 -
1 stop3h 59m
Tue 10/1114:44 -
1 stop5h 45m
Deal found 25/9£160
Sat 17/1006:00 -
Nonstop1h 36m
Mon 19/1019:50 -
Nonstop1h 31m
Deal found 25/9£177
Mon 9/1118:44 -
2 stops22h 19m
Mon 16/1110:26 -
1 stop7h 14m
Deal found 25/9£189
Thu 29/1018:50 -
Nonstop1h 29m
Sun 1/1115:30 -
Nonstop1h 27m
Deal found 24/9£190
Best flights from St. Louis to O'Hare Intl
Discover carefully curated flight deals from St. Louis to O'Hare Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 September 2026.
Thu 10/1214:17 -
1 stop5h 58m
Wed 13/109:30 -
1 stop5h 01m
Deal found 27/9£119
Mon 2/1118:50 -
Nonstop1h 29m
Tue 3/1120:10 -
Nonstop1h 30m
Deal found 22/9£154
Mon 9/1117:22 -
1 stop4h 11m
Mon 16/1117:42 -
1 stop5h 40m
Deal found 25/9£119
Wed 21/1010:35 -
1 stop5h 57m
Mon 26/1013:45 -
1 stop7h 06m
Deal found 23/9£131
Mon 18/106:45 -
1 stop5h 52m
Fri 5/217:20 -
1 stop5h 58m
Deal found 24/9£131
Thu 15/1008:00 -
Nonstop1h 31m
Mon 19/1019:50 -
Nonstop1h 31m
Deal found 24/9£177
Mon 21/1208:05 -
Nonstop1h 33m
Mon 28/1219:51 -
Nonstop1h 31m
Deal found 25/9£190
Thu 15/1014:38 -
1 stop5h 52m
Wed 11/1111:19 -
1 stop5h 55m
Deal found 26/9£251
Tue 24/1110:53 -
Nonstop1h 36m
Sun 29/1122:00 -
Nonstop1h 24m
Deal found 26/9£292
Thu 3/1210:14 -
1 stop3h 42m
Sat 5/1214:41 -
2 stops8h 45m
Deal found 23/9£282
Direct flights from St. Louis to O'Hare Intl
Explore direct flight options from St. Louis to O'Hare Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 September 2026.
Tue 20/1009:04 -
Nonstop1h 36m
Tue 27/1020:10 -
Nonstop1h 30m
Deal found 21/9£88
Fri 16/1013:29 -
Nonstop1h 31m
Mon 9/1110:45 -
Nonstop1h 25m
Deal found 23/9£109
Thu 15/1006:00 -
Nonstop1h 36m
Mon 19/1019:50 -
Nonstop1h 31m
Deal found 24/9£122
Fri 23/1006:00 -
Nonstop1h 36m
Fri 30/1010:45 -
Nonstop1h 25m
Deal found 23/9£129
Mon 2/1107:30 -
Nonstop1h 30m
Mon 2/1114:12 -
Nonstop1h 31m
Deal found 23/9£154
Mon 2/1117:29 -
Nonstop1h 36m
Tue 3/1118:03 -
Nonstop1h 19m
Deal found 23/9£156
Mon 19/1015:11 -
Nonstop1h 35m
Fri 23/1010:40 -
Nonstop1h 33m
Deal found 21/9£174
Sat 17/1006:00 -
Nonstop1h 36m
Mon 19/1019:50 -
Nonstop1h 31m
Deal found 25/9£177
Sat 9/109:22 -
Nonstop1h 38m
Sun 14/209:04 -
Nonstop1h 37m
Deal found 24/9£190
Thu 17/1205:20 -
Nonstop1h 38m
Sun 27/1222:00 -
Nonstop1h 38m
Deal found 25/9£202
Fri 23/1006:00 -
Nonstop1h 36m
Sun 25/1010:45 -
Nonstop1h 25m
Deal found 22/9£211
Last-minute flights from St. Louis to O'Hare Intl
Discover last-minute flight deals from St. Louis to O'Hare Intl. Data last updated 27 September 2026 and is based on user searches.
Wed 14/1010:35 -
1 stop5h 57m
Fri 16/1007:00 -
1 stop6h 53m
Deal found 23/9£131
Thu 15/1006:00 -
Nonstop1h 36m
Mon 19/1019:50 -
Nonstop1h 31m
Deal found 24/9£122
Fri 16/1013:29 -
Nonstop1h 31m
Mon 9/1110:45 -
Nonstop1h 25m
Deal found 23/9£109
Sat 17/1006:00 -
Nonstop1h 36m
Mon 19/1019:50 -
Nonstop1h 31m
Deal found 25/9£177
Wed 21/1010:35 -
1 stop5h 57m
Wed 28/1007:00 -
1 stop6h 53m
Deal found 23/9£119
Fri 23/1006:00 -
Nonstop1h 36m
Fri 30/1010:45 -
Nonstop1h 25m
Deal found 23/9£129
Fri 23/1006:00 -
Nonstop1h 36m
Sun 25/1010:45 -
Nonstop1h 25m
Deal found 22/9£211
Thu 29/1018:50 -
Nonstop1h 29m
Sun 1/1115:30 -
Nonstop1h 27m
Deal found 24/9£190
Thu 29/1006:47 -
1 stop6h 23m
Sun 1/1106:20 -
1 stop4h 18m
Deal found 24/9£213
One-way flights from St. Louis to O'Hare Intl
Search for one-way flight options from St. Louis to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated 27 September 2026.
Sat 24/1006:00 -
Nonstop1h 36m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 22/9£45
Wed 21/1010:35 -
1 stop5h 57m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 23/9£60
Fri 30/1006:00 -
Nonstop1h 36m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 23/9£65
Fri 27/1116:39 -
1 stop3h 38m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 26/9£72
Mon 2/1109:40 -
Nonstop1h 36m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 23/9£77
Mon 23/1109:40 -
Nonstop1h 36m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 25/9£79
Mon 9/1110:20 -
1 stop3h 39m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 25/9£98
Fri 25/1209:35 -
Nonstop1h 43m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 25/9£99
Wed 9/1205:25 -
Nonstop1h 33m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 22/9£125
Thu 24/1206:30 -
1 stop15h 09m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 26/9£126
Sat 24/1006:21 -
2 stops10h 05m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 24/9£131
Wed 9/1214:17 -
1 stop4h 09m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 22/9£131
Find flight deals from St. Louis to O'Hare Intl
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to O'Hare Intl (ORD). 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 27 September 2026.
Customise your flight search to find flights from St. Louis to O'Hare Intl 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 27 September 2026.
Use the filters below to find and compare flights from St. Louis to Chicago O'Hare Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Sat 24/10
17:33-21:27
1 stop3h 54m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£60
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Tue 3/11
06:47-12:59
1 stop6h 12m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£60
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Tue 20/10
06:47-12:59
1 stop6h 12m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£60
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Mon 26/10
14:38-18:29
1 stop3h 51m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£60
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Fri 30/10
06:00-07:36
Nonstop1h 36m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£65
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Mon 23/11
09:40-11:16
Nonstop1h 36m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£79
Fastest return journey
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Thu 22/10
08:00-09:31
Nonstop1h 31m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£79
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Thu 10/12
14:17-20:15
1 stop5h 58m
Chicago O'Hare Intl
Wed 13/1
09:30-14:31
1 stop5h 01m
£119
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Mon 9/11
17:22-21:33
1 stop4h 11m
Chicago O'Hare Intl
Mon 16/11
17:42-23:22
1 stop5h 40m
£119
St. LouisChicago
STL Lambert-St Louis - ORD Chicago O'Hare Intl
STLORD
Lambert-St Louis
Thu 24/12
06:30-21:39
1 stop15h 09m
Chicago O'Hare Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£126
Flights are sorted by cheapest return flights first.
Deals found on 26/9
Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from St. Louis to O'Hare Intl
Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from St. Louis with our price prediction graph.
STL-ORD
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 St. Louis to Chicago O'Hare Intl Airport
Prices
Airlines
How far ahead should I book a flight from St. Louis to Chicago O'Hare Intl Airport?
The best time to book flights from St. Louis to Chicago O'Hare Intl Airport is 36 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from St. Louis to Chicago O'Hare Intl Airport?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Chicago O'Hare Intl Airport (average of £209). Flying from St. Louis to Chicago O'Hare Intl Airport in September is currently the most expensive (average of £383). 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 STL to ORD?
Find hourly flight availability from St. Louis to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 September 2026.
A simple way to save on the total cost of your ticket is to fly from St. Louis to Chicago O'Hare Intl Airport in the evening. If you’re flexible enough to do this you can expect to save up to 45% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from St. Louis to Chicago O'Hare Intl Airport?
Use this chart to determine the cheapest time to fly return from St. Louis to O'Hare Intl. Price data was last updated on 26 September 2026.
Travellers seeking maximum savings on their St. Louis to Chicago O'Hare Intl Airport flight should consider departing on Monday at midday when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost for a return flight from St. Louis to Chicago O'Hare Intl Airport?
Airfare is below average for this route at the moment.
St. Louis to Chicago O'Hare Intl Airport flights typically cost between £185 and £311 in October.The cheapest return price found within the last 5 days was £109 on United Airlines (16 Oct–9 Nov).
Weekly flight availability from St. Louis to Chicago O'Hare Intl Airport
Explore weekly flight availability from St. Louis to O'Hare Intl. 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 27 September 2026.
The most flights from STL to ORD are scheduled on a Friday (64 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (41 on average).
Related info for your journey
Find useful and relevant information for your journey from St. Louis to O'Hare Intl. 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 from for flights from St. Louis to Chicago O'Hare Intl?
For a flight from St. Louis to Chicago O'Hare Intl, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 49 outbound flights to Chicago O'Hare Intl per day. 0 airlines have flights to Chicago O'Hare Intl from Lambert-St Louis on a regular basis.
How long is the flight from St. Louis to Chicago O'Hare Intl Airport?
There are many flights that can get you from St. Louis to Chicago O'Hare Intl Airport in 1h 33m. Fly via Delta or United Airlines to get the fastest option. The distance between St. Louis and Chicago O'Hare Intl Airport is about 258 mi. This flight may include one or multiple stops.
What are the most reliable airlines from St. Louis to Chicago O'Hare Intl Airport?
Consider Japan Airlines (93%), Cathay Pacific (93%) or Turkish Airlines (82%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Chicago O'Hare Intl Airport.
Can I find deals for flights from St. Louis to O'Hare Intl that include hotel bookings?
Yes. In addition to deals on St. Louis to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from St. Louis to O'Hare Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to O'Hare Intl.
Can I find deals for business class flights from St. Louis to O'Hare Intl?
Yes. Cheapflights offers flight deals from St. Louis to O'Hare Intl 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 St. Louis to Chicago O'Hare Intl Airport?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Chicago O'Hare Intl Airport (average of £209). Flying from St. Louis to Chicago O'Hare Intl Airport in September is currently the most expensive (average of £383). 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.
Explore flights to O'Hare Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 27 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 St. Louis to O'Hare Intl?
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 O'Hare Intl from St. Louis today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from St. Louis to O'Hare Intl?
Cheapflights helps you find that perfect flight to O'Hare Intl from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from St. Louis to O'Hare Intl with no change fees?
Yes, we can. To see specific flights from St. Louis to O'Hare Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from St. Louis to O'Hare Intl become cheaper?
Not ready to book yet? You can track prices for flights from St. Louis to O'Hare Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.
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