Calculations with different methods
- 984.361 miles
- 1584.175 kilometers
- 855.386 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
- 981.818 miles
- 1580.083 kilometers
- 853.177 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from Nantucket Memorial Airport (ACK) to Chicago Rockford International Airport (RFD) is 2 hours 21 minutes.
Time difference and current local times
The time difference between Nantucket and Rockford is 1 hour. Rockford is 1 hour behind Nantucket.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 139 kg (306 pounds).
Nantucket to Rockford flight map.
Frequent Flyer Miles Calculator
Nantucket (ACK) → Rockford (RFD).