How far is Rockford from Portland?
There are several ways to calculate distances between Portland and Rockford. Here are two common methods:Vincenty's formula (applied above)
- 1676.517 miles
- 2698.092 kilometers
- 1456.853 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
- 1672.063 miles
- 2690.925 kilometers
- 1452.983 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 Portland International Airport (PDX) to Chicago Rockford International Airport (RFD) is 3 hours 40 minutes.
Time difference and current local times
The time difference between Portland and Rockford is 2 hours. Rockford is 2 hours ahead of Portland.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 184 kg (405 pounds).
Portland to Rockford flight path
Shortest flight path between Portland International Airport (PDX) and Chicago Rockford International Airport (RFD).
Frequent Flyer Miles Calculator
Portland (PDX) → Rockford (RFD).