How far is Ontario, CA, from Chicago, IL?
The distance between Chicago (Chicago O'Hare International Airport) and Ontario (Ontario International Airport) is 1700 miles / 2736 kilometers / 1477 nautical miles.
The driving distance from Chicago (ORD) to Ontario (ONT) is 1974 miles / 3177 kilometers, and travel time by car is about 34 hours 29 minutes.
Chicago O'Hare International Airport – Ontario International Airport
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Distance from Chicago to Ontario
There are several ways to calculate the distance from Chicago to Ontario. 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 Chicago to Ontario?
The estimated flight time from Chicago O'Hare International Airport to Ontario International Airport is 3 hours and 43 minutes.
What is the time difference between Chicago and Ontario?
The time difference between Chicago and Ontario is 2 hours. Ontario is 2 hours behind Chicago.
Flight carbon footprint between Chicago O'Hare International Airport (ORD) and Ontario International Airport (ONT)
On average, flying from Chicago to Ontario 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 Chicago to Ontario
See the map of the shortest flight path between Chicago O'Hare International Airport (ORD) and Ontario International Airport (ONT).
Airport information
| Origin | 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 |
| Destination | Ontario International Airport |
|---|---|
| City: | Ontario, CA |
| Country: | United States |
| IATA Code: | ONT |
| ICAO Code: | KONT |
| Coordinates: | 34°3′21″N, 117°36′3″W |