How far is Rockford, IL, from Alpena, MI?
The distance between Alpena (Alpena County Regional Airport) and Rockford (Chicago Rockford International Airport) is 341 miles / 550 kilometers / 297 nautical miles.
The driving distance from Alpena (APN) to Rockford (RFD) is 507 miles / 816 kilometers, and travel time by car is about 9 hours 55 minutes.
Alpena County Regional Airport – Chicago Rockford International Airport
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Distance from Alpena to Rockford
There are several ways to calculate the distance from Alpena to Rockford. Here are two standard methods:
Vincenty's formula (applied above)- 341.457 miles
- 549.522 kilometers
- 296.718 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.
Haversine formula- 340.940 miles
- 548.690 kilometers
- 296.269 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 Alpena to Rockford?
The estimated flight time from Alpena County Regional Airport to Chicago Rockford International Airport is 1 hour and 8 minutes.
What is the time difference between Alpena and Rockford?
The time difference between Alpena and Rockford is 1 hour. Rockford is 1 hour behind Alpena.
Flight carbon footprint between Alpena County Regional Airport (APN) and Chicago Rockford International Airport (RFD)
On average, flying from Alpena to Rockford generates about 75 kg of CO2 per passenger, and 75 kilograms equals 166 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Alpena to Rockford
See the map of the shortest flight path between Alpena County Regional Airport (APN) and Chicago Rockford International Airport (RFD).
Airport information
| Origin | Alpena County Regional Airport |
|---|---|
| City: | Alpena, MI |
| Country: | United States  |
| IATA Code: | APN |
| ICAO Code: | KAPN |
| Coordinates: | 45°4′41″N, 83°33′37″W |
| Destination | Chicago Rockford International Airport |
|---|---|
| City: | Rockford, IL |
| Country: | United States |
| IATA Code: | RFD |
| ICAO Code: | KRFD |
| Coordinates: | 42°11′43″N, 89°5′49″W |