Air Miles Calculator logo

Distance between Chicago, IL (ORD) and Ontario, CA (ONT)

Flight distance from Chicago to Ontario (Chicago O'Hare International Airport – Ontario International Airport) is 1700 miles / 2736 kilometers / 1477 nautical miles. Estimated flight time is 3 hours 43 minutes.

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 – Ontario

Distance arrow
1700
Miles
Distance arrow
2736
Kilometers
Distance arrow
1477
Nautical miles

How far is Ontario from Chicago?

There are several ways to calculate distances between Los Angeles and Chicago. Here are two common 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 earth.

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?

Estimated flight time from Chicago O'Hare International Airport to Ontario International Airport is 3 hours 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.
Chicago time to Ontario time converter

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, 193 kilograms is equal to 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

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 Flag of 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 Flag of United States
IATA Code: ONT
ICAO Code: KONT
Coordinates: 34°3′21″N, 117°36′3″W