Map of flight path and driving directions from Seattle to Rockford.
Shortest flight path between Seattle Boeing Field (BFI) and Chicago Rockford International Airport (RFD).
How far is Rockford from Seattle?
There are several ways to calculate distances between Seattle and Rockford. Here are two common methods:Vincenty's formula (applied above)
- 1658.241 miles
- 2668.680 kilometers
- 1440.972 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
- 1653.907 miles
- 2661.706 kilometers
- 1437.206 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).
Time difference and current local times
The time difference between Seattle and Rockford is 2 hours. Rockford is 2 hours ahead of Seattle.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 190 kg (418 pounds).
Frequent Flyer Miles Calculator
Seattle (BFI) → Rockford (RFD).