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)
- 1658.530 miles
- 2669.145 kilometers
- 1441.223 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
- 1654.192 miles
- 2662.163 kilometers
- 1437.453 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 Seattle–Tacoma International Airport (SEA) to Chicago Rockford International Airport (RFD) is 3 hours 38 minutes.
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 182 kg (401 pounds).
Seattle to Rockford flight path
Shortest flight path between Seattle–Tacoma International Airport (SEA) and Chicago Rockford International Airport (RFD).
Frequent Flyer Miles Calculator
Seattle (SEA) → Rockford (RFD).