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 AirportMDWChicagoChicago Midway International Airport
ChicagoChicago Midway International Airport- Distance
- 251 mi
- Estimated flight time
- ~1h
Same local time in St. Louis and Chicago.
Observed nonstop
How often does this route fly?
Frequency
Several times a day
On average around 5 flights a day, observed from October 2025 to September 2026.
- 5
- flights per day
- 6
- busiest month · May
- 4
- quietest month · Jan
- 43 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 4Jan2026
- 4Feb
- 5Mar
- 5.5Apr
- 6May
- 6Jun
- 6Jul
- 5Aug
- 6Sep
- 5Oct2025
- 5Nov
- 5Dec
Airlines
Who flies it
Southwest Airlinesall year
Arizona Express Airlinesnow and then
Through the day
Departure times
Local time in St. Louis. Most departures between 14:00 and 17:00.
- 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
- 5.5Mon
- 5.6Tue
- 5.7Wed
- 5.7Thu
- 6Fri
- 4.2Sat
- 4.9Sun
Fleet
Aircraft observed
- Boeing 737-700B73738%
- Boeing 737 MAX 8B38M29%
- Boeing 737-800B73818%
- Bombardier Challenger 350CL354%
- Cessna Citation LatitudeC68A2%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 4 | 137 |
|
| February 2026 | 4 | 125 |
|
| March 2026 | 5 | 176 |
|
| April 2026 | 5.5 | 181 |
|
| May 2026 | 6 | 159 |
|
| June 2026 | 6 | 191 |
|
| July 2026 | 6 | 195 |
|
| August 2026 | 5 | 170 |
|
| September 2026 | 6 | 168 |
|
| October 2025 | 5 | 152 |
|
| November 2025 | 5 | 137 |
|
| December 2025 | 5 | 149 |
|
Airlines observed on this route
From observed callsign routes on STL-MDW - 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: 108.
The airports on this route
Chicago Midway International Airport
Chicago, United StatesMDW / KMDW
Major airport · 108 direct destinations · 4 runways · longest runway 6,522 ft
55 °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 ORDChicago O'Hare International AirportChicago is about 16 mi from Chicago.View route →STL GYYGary/Chicago International AirportGary is about 21 mi from Chicago.View route →STL RFDChicago Rockford International AirportChicago is about 75 mi from Chicago.View route →STL MKEGeneral Mitchell International AirportMilwaukee is about 81 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 Midway International Airport (MDW) covers approximately 251 mi. The estimated flight time is around 1h. Arizona Express Airlines and Southwest 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 Midway International Airport is approximately 251 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 MDW has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Arizona Express Airlines and Southwest Airlines.
- How often is there a flight from St. Louis to Chicago?
- On average around 5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 1,940 observed flights. Mainly Southwest Airlines, Arizona Express 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.