Air Miles Calculator

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

Distance from Chicago to Ontario (Ontario International Airport – O'Hare International Airport) is 1700 miles / 2736 kilometers / 1477 nautical miles.

Calculations with different 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).

Flight duration

Estimated flight time from O'Hare International Airport (ORD) 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
Ontario

Chicago, IL

 CDT

Ontario, CA

 PDT

Airport information


A 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

B 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

Map

Chicago to Ontario flight map.

Frequent Flyer Miles Calculator

Chicago (ORD) → Ontario (ONT).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1700
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1700

Round trip?