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.
Ciampino–G. B. Pastine International Airport – Chicago O'Hare International Airport
Search flights
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.
What is the time difference between Rome and Chicago?
The time difference between Rome and Chicago is 7 hours. Chicago is 7 hours behind Rome.
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 |