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Route

Chicago → St. Louis

MDWChicagoChicago Midway International Airport
STLSt. LouisSt. Louis Lambert International Airport
Distance
251 mi
Estimated flight time
~1h

Same local time in Chicago and St. Louis.

Observed nonstop

View the reverse route

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
6.5
busiest month · Jun
4
quietest month · Nov
45 min
measured flight time
12 / 12
months seen

Through the year

Per day, month by month

  1. 4Jan2026
  2. 4Feb
  3. 4Mar
  4. 6Apr
  5. 6May
  6. 6.5Jun
  7. 6Jul
  8. 5Aug
  9. 5Sep
  10. 5Oct2025
  11. 4Nov
  12. 4Dec

Airlines

Who flies it

Southwest Airlinesall year
Arizona Express Airlinesnow and then

Through the day

Departure times

Local time in Chicago. Most departures between 08:00 and 11:00.

  1. 00:00
  2. 01:00
  3. 02:00
  4. 03:00
  5. 04:00
  6. 05:00
  7. 06:00
  8. 07:00
  9. 08:00
  10. 09:00
  11. 10:00
  12. 11:00
  13. 12:00
  14. 13:00
  15. 14:00
  16. 15:00
  17. 16:00
  18. 17:00
  19. 18:00
  20. 19:00
  21. 20:00
  22. 21:00
  23. 22:00
  24. 23:00

Through the week

By weekday

  1. 5.6Mon
  2. 5.3Tue
  3. 5.3Wed
  4. 5.3Thu
  5. 5.4Fri
  6. 3.8Sat
  7. 4.7Sun

Fleet

Aircraft observed

  1. Boeing 737-700B73739%
  2. Boeing 737 MAX 8B38M28%
  3. Boeing 737-800B73820%
  4. Bombardier Challenger 350CL354%
  5. Cessna Citation LatitudeC68A2%
All the numbers in a table
MonthPer daySeenAirlines
January 20264127
  • Southwest Airlines111×
February 20264114
  • Southwest Airlines104×
  • Arizona Express Airlines2×
March 20264140
  • Southwest Airlines122×
April 20266168
  • Southwest Airlines139×
May 20266163
  • Southwest Airlines135×
June 20266.5184
  • Southwest Airlines154×
July 20266192
  • Southwest Airlines169×
August 20265159
  • Southwest Airlines143×
September 20265159
  • Southwest Airlines137×
October 20255144
  • Southwest Airlines128×
  • Arizona Express Airlines1×
November 20254139
  • Southwest Airlines120×
  • Arizona Express Airlines1×
December 20254129
  • Southwest Airlines114×

Airlines observed on this route

From observed callsign routes on MDW-STL - not a booking guarantee.

Arizona Express Airlines

TMP

Hub: STL St. Louis

13 departure airportsView airline →

Southwest Airlines

WN · SWA

Hub: DEN Denver

117 departure airportsView airline →

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: 108.
  • Direct destinations observed from St. Louis: 88.

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

54 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

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

Airport pageAll direct destinations

Alternative airports for this journey

Same journey, a different airport nearby - with an observed direct connection.

ORD STLChicago O'Hare International AirportChicago is about 16 mi from Chicago.View route →GYY STLGary/Chicago International AirportGary is about 21 mi from Chicago.View route →RFD STLChicago Rockford International AirportChicago is about 75 mi from Chicago.View route →MKE STLGeneral Mitchell International AirportMilwaukee is about 81 mi from Chicago.View route →

About the route from Chicago to St. Louis

The observed direct connection between Chicago Midway International Airport (MDW) and St. Louis Lambert International Airport (STL) 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 Chicago from St. Louis by air?
The great-circle distance between Chicago Midway International Airport and St. Louis Lambert International Airport is approximately 251 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 MDW and STL 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 Chicago to St. Louis?
On average around 5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 1,818 observed flights. Mainly Southwest Airlines, Arizona Express 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.