Map of flight path and driving directions from Chicago to St Louis.
Shortest flight path between Chicago Midway International Airport (MDW) and St. Louis Lambert International Airport (STL).
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).
Time difference and current local times
There is no time difference between Chicago and St Louis.
St Louis, MO
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 62 kg (137 pounds).
Frequent Flyer Miles Calculator
Chicago (MDW) → St Louis (STL).