How far is Alpena from Chicago?
There are several ways to calculate distances between Chicago and Alpena. Here are two common methods:Vincenty's formula (applied above)
- 305.542 miles
- 491.722 kilometers
- 265.509 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
- 305.246 miles
- 491.245 kilometers
- 265.251 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 Alpena County Regional Airport (APN) is 1 hour 4 minutes.
Time difference and current local times
The time difference between Chicago and Alpena is 1 hour. Alpena is 1 hour ahead of Chicago.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 67 kg (148 pounds).
Chicago to Alpena flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Alpena (APN).