Distance between Chicago, IL (MDW) and Ontario, CA (ONT)
Distance from Chicago to Ontario (Midway International Airport – Ontario International Airport) is 1706 miles / 2745 kilometers / 1482 nautical miles.
Calculate Distance
Search by airport name, city or IATA airport code.
Multiple airports
Chicago - Ontario
How far is Ontario from Chicago?
There are several ways to calculate distances between Chicago and Ontario. 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).
Flight duration
Estimated flight time from Midway International Airport (MDW) to Ontario International Airport (ONT) is 3 hours 43 minutes.
Time difference and current local times
The time difference between Chicago and Ontario is 2 hours. Ontario is 2 hours behind Chicago.
Time Difference
Chicago, IL
Ontario, CA
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 187 kg (413 pounds).
Airport information
| A | Midway International Airport |
|---|---|
| City: | Chicago, IL |
| Country: | United States  |
| IATA Code: | MDW |
| ICAO Code: | KMDW |
| Coordinates: | 41°47′9″N, 87°45′8″W |
| B | Ontario International Airport |
|---|---|
| City: | Ontario, CA |
| Country: | United States |
| IATA Code: | ONT |
| ICAO Code: | KONT |
| Coordinates: | 34°3′21″N, 117°36′3″W |
Chicago to Ontario flight path
Shortest flight path between Midway International Airport (MDW) and Ontario International Airport (ONT).
Frequent Flyer Miles Calculator
Chicago (MDW) → Ontario (ONT).
In total
Round trip?