How far is Reading from Chicago?
There are several ways to calculate distances between Chicago and Reading. Here are two common methods:Vincenty's formula (applied above)
- 631.674 miles
- 1016.582 kilometers
- 548.910 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
- 630.126 miles
- 1014.090 kilometers
- 547.565 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).
Estimated flight time from O'Hare International Airport (ORD) to Reading Regional Airport (RDG) is 1 hour 41 minutes.
Time difference and current local times
The time difference between Chicago and Reading is 1 hour. Reading is 1 hour ahead of Chicago.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 117 kg (257 pounds).
Chicago to Reading flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Reading (RDG).