How far is Chicago, IL, from Ontario, CA?
The distance between Ontario (Ontario International Airport) and Chicago (Chicago O'Hare International Airport) is 1700 miles / 2736 kilometers / 1477 nautical miles.
The driving distance from Ontario (ONT) to Chicago (ORD) is 1975 miles / 3178 kilometers, and travel time by car is about 34 hours 34 minutes.
Ontario International Airport – Chicago O'Hare International Airport
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Distance from Ontario to Chicago
There are several ways to calculate the distance from Ontario to Chicago. Here are two standard methods:
Vincenty's formula (applied above)- 1699.875 miles
- 2735.684 kilometers
- 1477.151 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.
Haversine formula- 1696.557 miles
- 2730.343 kilometers
- 1474.267 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).
How long does it take to fly from Ontario to Chicago?
The estimated flight time from Ontario International Airport to Chicago O'Hare International Airport is 3 hours and 43 minutes.
What is the time difference between Ontario and Chicago?
The time difference between Ontario and Chicago is 2 hours. Chicago is 2 hours ahead of Ontario.
Flight carbon footprint between Ontario International Airport (ONT) and Chicago O'Hare International Airport (ORD)
On average, flying from Ontario to Chicago generates about 193 kg of CO2 per passenger, and 193 kilograms equals 425 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Ontario to Chicago
See the map of the shortest flight path between Ontario International Airport (ONT) and Chicago O'Hare International Airport (ORD).
Airport information
| Origin | Ontario International Airport |
|---|---|
| City: | Ontario, CA |
| Country: | United States  |
| IATA Code: | ONT |
| ICAO Code: | KONT |
| Coordinates: | 34°3′21″N, 117°36′3″W |
| Destination | Chicago O'Hare International Airport |
|---|---|
| City: | Chicago, IL |
| Country: | United States |
| IATA Code: | ORD |
| ICAO Code: | KORD |
| Coordinates: | 41°58′42″N, 87°54′17″W |