Chicago O'Hare International Airport
Chicago, United StatesORD / KORD
International hub · 259 direct destinations · 8 runways · longest runway 12,999 ft
56 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Chicago → St. Louis
ORD
ChicagoChicago O'Hare International Airport
ChicagoChicago O'Hare International AirportSTLSt. LouisSt. Louis Lambert International Airport
St. LouisSt. Louis Lambert International Airport- Distance
- 258 mi
- Estimated flight time
- ~1h
Same local time in Chicago and St. Louis.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 13.5 flights a day, observed from October 2025 to September 2026.
- 13.5
- flights per day
- 17
- busiest month · May
- 11
- quietest month · Dec
- 46 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 11Jan2026
- 13Feb
- 14Mar
- 16Apr
- 17May
- 14.5Jun
- 16Jul
- 14Aug
- 13Sep
- 13Oct2025
- 12Nov
- 11Dec
Airlines
Who flies it
GoJet Airlines LLCall year
Envoy Airall year
SkyWest Airlinesall year
United Airlinesall year
American Airlinesspring
Republic Airwaysall year
Delta Air Linesnow and then
Through the day
Departure times
Local time in Chicago. Most departures between 13:00 and 16:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 13.1Mon
- 12.5Tue
- 12.8Wed
- 13.4Thu
- 13.9Fri
- 13.1Sat
- 13.3Sun
Fleet
Aircraft observed
- Bombardier CRJ700CRJ749%
- Embraer 175E75L17%
- Embraer 170E1709%
- Airbus A319A3199%
- Boeing 737-800B7385%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 11 | 326 |
|
| February 2026 | 13 | 377 |
|
| March 2026 | 14 | 402 |
|
| April 2026 | 16 | 431 |
|
| May 2026 | 17 | 463 |
|
| June 2026 | 14.5 | 434 |
|
| July 2026 | 16 | 452 |
|
| August 2026 | 14 | 410 |
|
| September 2026 | 13 | 386 |
|
| October 2025 | 13 | 390 |
|
| November 2025 | 12 | 356 |
|
| December 2025 | 11 | 321 |
|
Airlines observed on this route
From observed callsign routes on ORD-STL - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Chicago: 259.
- Direct destinations observed from St. Louis: 88.
The airports on this route
St. Louis Lambert International Airport
St. Louis, United StatesSTL / KSTL
Major airport · 88 direct destinations · 4 runways · longest runway 11,020 ft
54 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
MDW STLChicago Midway International AirportChicago is about 16 mi from Chicago.View route →GYY STLGary/Chicago International AirportGary is about 35 mi from Chicago.View route →RFD STLChicago Rockford International AirportChicago is about 63 mi from Chicago.View route →MKE STLGeneral Mitchell International AirportMilwaukee is about 67 mi from Chicago.View route →
About the route from Chicago to St. Louis
The observed direct connection between Chicago O'Hare International Airport (ORD) and St. Louis Lambert International Airport (STL) covers approximately 258 mi. The estimated flight time is around 1h. American Airlines, Delta Air Lines, Envoy Air, GoJet Airlines LLC, Republic Airways, SkyWest Airlines and United Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Chicago from St. Louis by air?
- The great-circle distance between Chicago O'Hare International Airport and St. Louis Lambert International Airport is approximately 258 mi.
- How long is the flight from Chicago to St. Louis?
- Based on the distance, the estimated flight time is about 1h. This is an estimate, not a schedule.
- Is there a direct connection from Chicago to St. Louis?
- Yes, a direct connection between ORD and STL has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: American Airlines, Delta Air Lines, Envoy Air, GoJet Airlines LLC, Republic Airways, SkyWest Airlines and United Airlines.
- How often is there a flight from Chicago to St. Louis?
- On average around 13.5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 4,748 observed flights. Mainly GoJet Airlines LLC, Envoy Air, SkyWest Airlines. That is an observation, not a timetable.
- What is the current time difference between Chicago and St. Louis?
- Same local time in Chicago and St. Louis.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.