# How far is Chicago, IL, from Rome?

The distance between Rome (Ciampino–G. B. Pastine International Airport) and Chicago (Chicago O'Hare International Airport) is 4837 miles / 7785 kilometers / 4203 nautical miles.

4837
Miles
7785
Kilometers
4203
Nautical miles
9 h 39 min
563 kg

## Distance from Rome to Chicago

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

Vincenty's formula (applied above)
• 4837.187 miles
• 7784.697 kilometers
• 4203.400 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
• 4824.750 miles
• 7764.682 kilometers
• 4192.593 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 Rome to Chicago?

The estimated flight time from Ciampino–G. B. Pastine International Airport to Chicago O'Hare International Airport is 9 hours and 39 minutes.

## Flight carbon footprint between Ciampino–G. B. Pastine International Airport (CIA) and Chicago O'Hare International Airport (ORD)

On average, flying from Rome to Chicago generates about 563 kg of CO2 per passenger, and 563 kilograms equals 1 241 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

## Map of flight path from Rome to Chicago

See the map of the shortest flight path between Ciampino–G. B. Pastine International Airport (CIA) and Chicago O'Hare International Airport (ORD).

## Airport information

Origin Ciampino–G. B. Pastine International Airport
City: Rome
Country: Italy
IATA Code: CIA
ICAO Code: LIRA
Coordinates: 41°47′57″N, 12°35′41″E
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