How far is Alpena, MI, from Rockford, IL?
The distance between Rockford (Chicago Rockford International Airport) and Alpena (Alpena County Regional Airport) is 341 miles / 550 kilometers / 297 nautical miles.
The driving distance from Rockford (RFD) to Alpena (APN) is 505 miles / 813 kilometers, and travel time by car is about 9 hours 51 minutes.
Chicago Rockford International Airport – Alpena County Regional Airport
Search flights
Distance from Rockford to Alpena
There are several ways to calculate the distance from Rockford to Alpena. 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 Rockford to Alpena?
The estimated flight time from Chicago Rockford International Airport to Alpena County Regional Airport is 1 hour and 8 minutes.
What is the time difference between Rockford and Alpena?
The time difference between Rockford and Alpena is 1 hour. Alpena is 1 hour ahead of Rockford.
Flight carbon footprint between Chicago Rockford International Airport (RFD) and Alpena County Regional Airport (APN)
On average, flying from Rockford to Alpena 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 Rockford to Alpena
See the map of the shortest flight path between Chicago Rockford International Airport (RFD) and Alpena County Regional Airport (APN).
Airport information
| Origin | 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 |
| Destination | 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 |