Air Miles Calculator

Distance between Chicago, IL (MDW) and St Louis, MO (STL)

Distance from Chicago to St Louis (Chicago Midway International Airport – St. Louis Lambert International Airport) is 251 miles / 404 kilometers / 218 nautical miles.

How far is St Louis from Chicago?

There are several ways to calculate distances between Chicago and St Louis. Here are two common methods:

Vincenty's formula (applied above)
  • 251.083 miles
  • 404.078 kilometers
  • 218.185 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
  • 251.136 miles
  • 404.164 kilometers
  • 218.231 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

Flight duration

Estimated flight time from Chicago Midway International Airport (MDW) to St. Louis Lambert International Airport (STL) is 58 minutes.

Time difference and current local times

There is no time difference between Chicago and St Louis.

Time Difference

Chicago
St Louis

Chicago, IL

 CDT

St Louis, MO

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 60 kg (132 pounds).

Airport information


A Chicago Midway International Airport
City: Chicago, IL
Country: United States Flag of United States
IATA Code: MDW
ICAO Code: KMDW
Coordinates: 41°47′9″N, 87°45′8″W

B St. Louis Lambert International Airport
City: St Louis, MO
Country: United States Flag of United States
IATA Code: STL
ICAO Code: KSTL
Coordinates: 38°44′55″N, 90°22′12″W

Chicago to St Louis flight path

Shortest flight path between Chicago Midway International Airport (MDW) and St. Louis Lambert International Airport (STL).

Frequent Flyer Miles Calculator

Chicago (MDW) → St Louis (STL).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
251
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
251

Round trip?