How far is Chicago, IL, from Porto?

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

Distance from Porto to Chicago

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

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

What is the time difference between Porto and Chicago?

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

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

On average, flying from Porto to Chicago 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 Porto to Chicago

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

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 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