Air Miles Calculator

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

Flight distance from Ontario to Chicago (Ontario International Airport – Chicago Midway International Airport) is 1706 miles / 2745 kilometers / 1482 nautical miles. Estimated flight time is 3 hours 43 minutes.

Driving distance from Ontario (ONT) to Chicago (MDW) is 1973 miles / 3176 kilometers and travel time by car is about 32 hours 30 minutes.

Map of flight path and driving directions from Ontario to Chicago.

Shortest flight path between Ontario International Airport (ONT) and Chicago Midway International Airport (MDW).

How far is Chicago from Ontario?

There are several ways to calculate distances between Ontario and Chicago. 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).

Airport information


A 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

B Chicago Midway International Airport
City: Chicago, IL
Country: United States Flag of United States
IATA Code: MDW
ICAO Code: KMDW
Coordinates: 41°47′9″N, 87°45′8″W

Time difference and current local times

The time difference between Ontario and Chicago is 2 hours. Chicago is 2 hours ahead of Ontario.

Time Difference

Ontario, CA

 PDT

Chicago, IL

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 187 kg (413 pounds).

Frequent Flyer Miles Calculator

Ontario (ONT) → Chicago (MDW).

Distance:
1706
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1706

Round trip?