Map of flight path and driving directions from Ontario to Chicago.
Shortest flight path between Ontario International Airport (ONT) and Chicago Midway International Airport (MDW).
How far is Chicago from Ontario?
There are several ways to calculate distances between Ontario and Chicago. Here are two common methods:Vincenty's formula (applied above)
- 1705.645 miles
- 2744.969 kilometers
- 1482.165 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
- 1702.286 miles
- 2739.563 kilometers
- 1479.246 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
The time difference between Ontario and Chicago is 2 hours. Chicago is 2 hours ahead of Ontario.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 187 kg (413 pounds).
Frequent Flyer Miles Calculator
Ontario (ONT) → Chicago (MDW).