Air Miles Calculator

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

Flight distance from St Louis to Chicago (St. Louis Lambert International Airport – Chicago Midway International Airport) is 251 miles / 404 kilometers / 218 nautical miles. Estimated flight time is 58 minutes.

Driving distance from St Louis (STL) to Chicago (MDW) is 298 miles / 479 kilometers and travel time by car is about 5 hours 16 minutes.

Map of flight path and driving directions from St Louis to Chicago.

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

How far is Chicago from St Louis?

There are several ways to calculate distances between St Louis and Chicago. 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).

Airport information


A 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

B 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

Time difference and current local times

There is no time difference between St Louis and Chicago.

Time Difference

St Louis, MO

 CDT

Chicago, IL

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 62 kg (137 pounds).

Frequent Flyer Miles Calculator

St Louis (STL) → Chicago (MDW).

Distance:
251
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
251

Round trip?