How far is Porto from Chicago, IL?

The distance between Chicago (Chicago O'Hare International Airport) and Porto (Porto Airport) is 3944 miles / 6348 kilometers / 3428 nautical miles.

Distance from Chicago to Porto

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

Vincenty's formula (applied above)

• 3944.439 miles
• 6347.960 kilometers
• 3427.624 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

• 3934.272 miles
• 6331.596 kilometers
• 3418.789 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 Chicago to Porto?

The estimated flight time from Chicago O'Hare International Airport to Porto Airport is 7 hours and 58 minutes.

What is the time difference between Chicago and Porto?

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

Flight carbon footprint between Chicago O'Hare International Airport (ORD) and Porto Airport (OPO)

On average, flying from Chicago to Porto generates about 449 kg of CO2 per passenger, and 449 kilograms equals 991 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Chicago to Porto

See the map of the shortest flight path between Chicago O'Hare International Airport (ORD) and Porto Airport (OPO).

Airport information

Origin	Chicago O'Hare International Airport
City:	Chicago, IL
Country:	United States
IATA Code:	ORD
ICAO Code:	KORD
Coordinates:	41°58′42″N, 87°54′17″W

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