How far is Porto from Rockford, IL?

The distance between Rockford (Chicago Rockford International Airport) and Porto (Porto Airport) is 3991 miles / 6423 kilometers / 3468 nautical miles.

Distance from Rockford to Porto

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

Vincenty's formula (applied above)

• 3991.234 miles
• 6423.268 kilometers
• 3468.287 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

• 3980.925 miles
• 6406.678 kilometers
• 3459.329 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 Porto?

The estimated flight time from Chicago Rockford International Airport to Porto Airport is 8 hours and 3 minutes.

What is the time difference between Rockford and Porto?

The time difference between Rockford and Porto is 6 hours. Porto is 6 hours ahead of Rockford.

Flight carbon footprint between Chicago Rockford International Airport (RFD) and Porto Airport (OPO)

On average, flying from Rockford to Porto generates about 455 kg of CO2 per passenger, and 455 kilograms equals 1 004 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Rockford to Porto

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

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	Porto Airport
City:	Porto
Country:	Portugal
IATA Code:	OPO
ICAO Code:	LPPR
Coordinates:	41°14′53″N, 8°40′53″W