How far is Rockford, IL, from Porto?

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

Distance from Porto to Rockford

There are several ways to calculate the distance from Porto to Rockford. 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 Porto to Rockford?

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

What is the time difference between Porto and Rockford?

The time difference between Porto and Rockford is 6 hours. Rockford is 6 hours behind Porto.

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

On average, flying from Porto to Rockford 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 Porto to Rockford

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

Airport information

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

Destination	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