Air Miles Calculator

Distance between Duluth, MN (DLH) and Rockford, IL (RFD)

Distance from Duluth to Rockford (Chicago Rockford International Airport – Duluth International Airport) is 355 miles / 572 kilometers / 309 nautical miles.

Calculations with different methods

Vincenty's formula (applied above)
  • 355.371 miles
  • 571.914 kilometers
  • 308.809 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
  • 355.379 miles
  • 571.927 kilometers
  • 308.816 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).

Flight duration

Estimated flight time from Duluth International Airport (DLH) to Chicago Rockford International Airport (RFD) is 1 hour 10 minutes.

Time difference and current local times

There is no time difference between Duluth and Rockford.

Time Difference

Duluth
Rockford

Duluth, MN

 CDT

Rockford, IL

 CDT

Airport information


A Duluth International Airport
City: Duluth, MN
Country: United States Flag of United States
IATA Code: DLH
ICAO Code: KDLH
Coordinates: 46°50′31″N, 92°11′36″W

B Chicago Rockford International Airport
City: Rockford, IL
Country: United States Flag of United States
IATA Code: RFD
ICAO Code: KRFD
Coordinates: 42°11′43″N, 89°5′49″W

Map

Duluth to Rockford flight map.

Frequent Flyer Miles Calculator

Duluth (DLH) → Rockford (RFD).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
355
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
355

Round trip?