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
Route
St. Louis → Chicago
STL
St. LouisSt. Louis Lambert International Airport
St. LouisSt. Louis Lambert International AirportORDChicagoChicago O'Hare International Airport
ChicagoChicago O'Hare International Airport- Distance
- 258 mi
- Estimated flight time
- ~1h
Same local time in St. Louis and Chicago.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 14 flights a day, observed from October 2025 to September 2026.
- 14
- flights per day
- 17
- busiest month · May
- 11
- quietest month · Dec
- 51 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 11Jan2026
- 13.5Feb
- 14Mar
- 16.5Apr
- 17May
- 15Jun
- 16Jul
- 15Aug
- 14Sep
- 13Oct2025
- 12Nov
- 11Dec
Airlines
Who flies it
GoJet Airlines LLCall year
Envoy Airall year
SkyWest Airlinesall year
United Airlinesall year
American Airlinesall year
Republic Airwaysall year
Through the day
Departure times
Local time in St. Louis. Most departures between 06:00 and 09:00.
- 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
- 13.8Mon
- 13.4Tue
- 13.7Wed
- 14Thu
- 15.1Fri
- 13.6Sat
- 13.9Sun
Fleet
Aircraft observed
- Bombardier CRJ700CRJ750%
- Embraer 175E75L16%
- Airbus A319A31910%
- Embraer 170E1709%
- Boeing 737-800B7383%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 11 | 342 |
|
| February 2026 | 13.5 | 385 |
|
| March 2026 | 14 | 460 |
|
| April 2026 | 16.5 | 477 |
|
| May 2026 | 17 | 479 |
|
| June 2026 | 15 | 447 |
|
| July 2026 | 16 | 492 |
|
| August 2026 | 15 | 434 |
|
| September 2026 | 14 | 411 |
|
| October 2025 | 13 | 409 |
|
| November 2025 | 12 | 361 |
|
| December 2025 | 11 | 324 |
|
Airlines observed on this route
From observed callsign routes on STL-ORD - 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 St. Louis: 88.
- Direct destinations observed from Chicago: 259.
The airports on this route
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
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
STL MDWChicago Midway International AirportChicago is about 16 mi from Chicago.View route →STL GYYGary/Chicago International AirportGary is about 35 mi from Chicago.View route →STL RFDChicago Rockford International AirportChicago is about 63 mi from Chicago.View route →STL MKEGeneral Mitchell International AirportMilwaukee is about 67 mi from Chicago.View route →
About the route from St. Louis to Chicago
The observed direct connection between St. Louis Lambert International Airport (STL) and Chicago O'Hare International Airport (ORD) covers approximately 258 mi. The estimated flight time is around 1h. American Airlines, 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 St. Louis from Chicago by air?
- The great-circle distance between St. Louis Lambert International Airport and Chicago O'Hare International Airport is approximately 258 mi.
- How long is the flight from St. Louis to Chicago?
- Based on the distance, the estimated flight time is about 1h. This is an estimate, not a schedule.
- Is there a direct connection from St. Louis to Chicago?
- Yes, a direct connection between STL and ORD has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: American Airlines, Envoy Air, GoJet Airlines LLC, Republic Airways, SkyWest Airlines and United Airlines.
- How often is there a flight from St. Louis to Chicago?
- On average around 14 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 5,021 observed flights. Mainly GoJet Airlines LLC, Envoy Air, SkyWest Airlines. That is an observation, not a timetable.
- What is the current time difference between St. Louis and Chicago?
- Same local time in St. Louis and Chicago.
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.