How far is Sofia from Rockford, IL?

The distance between Rockford (Chicago Rockford International Airport) and Sofia (Sofia Airport) is 5244 miles / 8439 kilometers / 4557 nautical miles.

Distance from Rockford to Sofia

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

Vincenty's formula (applied above)

• 5243.840 miles
• 8439.142 kilometers
• 4556.772 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

• 5230.289 miles
• 8417.334 kilometers
• 4544.997 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 Sofia?

The estimated flight time from Chicago Rockford International Airport to Sofia Airport is 10 hours and 25 minutes.

What is the time difference between Rockford and Sofia?

The time difference between Rockford and Sofia is 8 hours. Sofia is 8 hours ahead of Rockford.

Flight carbon footprint between Chicago Rockford International Airport (RFD) and Sofia Airport (SOF)

On average, flying from Rockford to Sofia generates about 616 kg of CO2 per passenger, and 616 kilograms equals 1 357 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Rockford to Sofia

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

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	Sofia Airport
City:	Sofia
Country:	Bulgaria
IATA Code:	SOF
ICAO Code:	LBSF
Coordinates:	42°41′48″N, 23°24′41″E