How far is Ulsan from Rockford, IL?

The distance between Rockford (Chicago Rockford International Airport) and Ulsan (Ulsan Airport) is 6554 miles / 10547 kilometers / 5695 nautical miles.

Distance from Rockford to Ulsan

There are several ways to calculate the distance from Rockford to Ulsan. Here are two standard methods:

Vincenty's formula (applied above)

• 6553.747 miles
• 10547.234 kilometers
• 5695.051 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.

Haversine formula

• 6538.945 miles
• 10523.412 kilometers
• 5682.188 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).

How long does it take to fly from Rockford to Ulsan?

The estimated flight time from Chicago Rockford International Airport to Ulsan Airport is 12 hours and 54 minutes.

What is the time difference between Rockford and Ulsan?

The time difference between Rockford and Ulsan is 15 hours. Ulsan is 15 hours ahead of Rockford.

Flight carbon footprint between Chicago Rockford International Airport (RFD) and Ulsan Airport (USN)

On average, flying from Rockford to Ulsan generates about 793 kg of CO2 per passenger, and 793 kilograms equals 1 747 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Rockford to Ulsan

See the map of the shortest flight path between Chicago Rockford International Airport (RFD) and Ulsan Airport (USN).

Airport information

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

Destination	Ulsan Airport
City:	Ulsan
Country:	South Korea
IATA Code:	USN
ICAO Code:	RKPU
Coordinates:	35°35′36″N, 129°21′7″E