How far is Chicago from Rome?
There are several ways to calculate distances between Rome and Chicago. Here are two common methods:Vincenty's formula (applied above)
- 4823.115 miles
- 7762.052 kilometers
- 4191.173 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.Haversine formula
- 4810.711 miles
- 7742.090 kilometers
- 4180.394 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).
Estimated flight time from Leonardo da Vinci–Fiumicino Airport (FCO) to Chicago O'Hare International Airport (ORD) is 9 hours 37 minutes.
Time difference and current local times
The time difference between Rome and Chicago is 7 hours. Chicago is 7 hours behind Rome.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 568 kg (1 253 pounds).
Rome to Chicago flight path
Shortest flight path between Leonardo da Vinci–Fiumicino Airport (FCO) and Chicago O'Hare International Airport (ORD).
Frequent Flyer Miles Calculator
Rome (FCO) → Chicago (ORD).