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 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.

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.

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.

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 5h 52m. 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.

Weekly flight availability from Chicago O'Hare Intl Airport to St. Louis

The most flights from ORD to STL are scheduled on a Monday (70 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 on average).

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 Porter Airlines (94%), Republic Airways (92%) and SkyWest Airlines (89%).

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 54 daily inbound flights from Chicago O'Hare Intl from 0 different airlines.

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.

£52+ Cheap Flights from Chicago O'Hare Intl Airport to St. Louis

Cheap flight deals from O'Hare Intl to St. Louis

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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 11 November 2026.

Sat 5/1216:40 -

Nonstop1h 36m

Mon 7/1217:40 -

Nonstop1h 25m

Deal found 9/11£115

Wed 2/1214:41 -

1 stop5h 51m

Wed 3/210:57 -

1 stop5h 29m

Deal found 9/11£117

Sat 5/1206:20 -

1 stop4h 40m

Sat 5/1215:32 -

1 stop6h 03m

Deal found 9/11£119

Wed 30/1209:00 -

Nonstop1h 42m

Fri 1/109:35 -

Nonstop1h 43m

Deal found 8/11£122

Thu 24/1206:50 -

Nonstop1h 39m

Thu 31/1216:32 -

Nonstop1h 27m

Deal found 9/11£125

Sat 5/1217:33 -

1 stop5h 53m

Mon 1/210:57 -

1 stop5h 29m

Deal found 9/11£129

Sat 5/1206:20 -

1 stop4h 40m

Thu 10/1206:32 -

1 stop4h 27m

Deal found 9/11£130

Thu 31/1214:35 -

Nonstop1h 33m

Fri 1/105:20 -

Nonstop1h 38m

Deal found 7/11£134

Sat 5/1211:14 -

1 stop4h 38m

Mon 7/1210:14 -

1 stop6h 03m

Deal found 10/11£137

Fri 4/1214:41 -

1 stop5h 51m

Tue 8/1215:32 -

1 stop6h 03m

Deal found 9/11£137

Thu 3/1207:05 -

1 stop6h 25m

Thu 28/106:20 -

1 stop6h 44m

Deal found 9/11£141

Fri 4/1217:33 -

1 stop5h 53m

Wed 9/1210:14 -

1 stop6h 03m

Deal found 10/11£148

Find flight deals from O'Hare Intl to St. Louis

Round-trip from	£115
One-way from	£52
Popular in	May
Cheapest in	December
Average price	£298

United Airlines
5/12-7/12
Nonstop
3h 01m total
Chicago to St. Louis

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United Airlines
15/12-31/12
Nonstop
1h 36m total
Chicago to St. Louis

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (£47 potential increase over avg. return price).

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Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).

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Average for round-trip flights in November 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to St. Louis that are best for you.

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ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Tue 19/1

21:45-23:20

Nonstop1h 35m

Lambert-St Louis

Wed 31/12

00:00-00:00

Nonstop0h 00m

£52

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Sat 5/12

10:52-12:24

Nonstop1h 32m

Lambert-St Louis

Wed 31/12

00:00-00:00

Nonstop0h 00m

£52

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Tue 2/3

12:44-16:40

1 stop3h 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

Tue 1/12

17:33-23:26

1 stop5h 53m

Lambert-St Louis

Wed 31/12

00:00-00:00

Nonstop0h 00m

£60

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Sat 12/12

17:33-23:26

1 stop5h 53m

Lambert-St Louis

Wed 31/12

00:00-00:00

Nonstop0h 00m

£60

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Wed 13/1

09:58-14:38

1 stop4h 40m

Lambert-St Louis

Wed 31/12

00:00-00:00

Nonstop0h 00m

£60

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Mon 1/3

19:55-21:23

Nonstop1h 28m

Lambert-St Louis

Wed 31/12

00:00-00:00

Nonstop0h 00m

£63

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Thu 31/12

06:29-10:35

1 stop4h 06m

Lambert-St Louis

Wed 31/12

00:00-00:00

Nonstop0h 00m

£71

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Tue 1/12

17:33-23:26

1 stop5h 53m

Lambert-St Louis

Wed 2/12

10:14-13:56

1 stop3h 42m

£119

ChicagoSt. Louis

ORD Chicago O'Hare Intl - STL Lambert-St Louis

ORDSTL

Chicago O'Hare Intl

Sat 12/12

06:20-11:00

1 stop4h 40m

Lambert-St Louis

Sat 12/12

16:38-20:15

1 stop3h 37m

£119

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 23 resultsSorted by cheapest first

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

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Airlines

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 £175). 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?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 94% 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 £211 and £476 in December.
The cheapest return price found within the last 5 days was £115 on United Airlines (5 Dec–7 Dec).

Related info for your journey

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 54 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 5h 52m. 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 Porter Airlines (94%), Republic Airways (92%) and SkyWest Airlines (89%).
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 £175). 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.

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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!

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Cheap flights from Chicago O'Hare Intl Airport to St. Louis from £52

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from O'Hare Intl to St. Louis

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 11 November 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 11 November 2026.

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 stopovers in mind to ensure you get the best travel experience. Data last updated 11 November 2026.

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 11 November 2026.

Direct flights from O'Hare Intl to St. LouisExplore 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 11 November 2026.

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 11 November 2026.

Last-minute flights from O'Hare Intl to St. LouisDiscover last-minute flight deals from O'Hare Intl to St. Louis. Data last updated 11 November 2026 and is based on user searches.

Discover last-minute flight deals from O'Hare Intl to St. Louis. Data last updated 11 November 2026 and is based on user searches.

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 11 November 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 11 November 2026.

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Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to St. Louis that are best for you.

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.

Cheapflights Insights

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?

What is the cheapest time of day to fly from ORD to STL?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 94% 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 £211 and £476 in December.The cheapest return price found within the last 5 days was £115 on United Airlines (5 Dec–7 Dec).

Weekly flight availability from Chicago O'Hare Intl Airport to St. Louis

The most flights from ORD to STL are scheduled on a Monday (70 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 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

What airport do you fly into for flights to St. Louis from Chicago O'Hare Intl?

How long is the flight from Chicago O'Hare Intl Airport to St. Louis?

What are the most reliable airlines from Chicago O'Hare Intl Airport to St. Louis?

Can I find deals for flights from O'Hare Intl to St. Louis that include hotel bookings?

How can I 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?

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?

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O'Hare Intl and St. Louis flights

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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 11 November 2026.

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 11 November 2026.

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 11 November 2026.

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 11 November 2026 and is based on user searches.

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 11 November 2026.

Chicago O'Hare Intl Airport to St. Louis flights typically cost between £211 and £476 in December.
The cheapest return price found within the last 5 days was £115 on United Airlines (5 Dec–7 Dec).