Air Miles Calculator

Distance between Chicago, IL (ORD) and Rome (FCO)

Distance from O'Hare International Airport to Leonardo da Vinci–Fiumicino Airport is 4823 miles / 7762 kilometers / 4191 nautical miles.

Calculations with different 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).

Flight duration

Estimated flight time from O'Hare International Airport (ORD) to Leonardo da Vinci–Fiumicino Airport (FCO) is 9 hours 37 minutes.

Time difference and current local times

The time difference between Chicago and Rome is 7 hours. Rome is 7 hours ahead of Chicago.

Time Difference

Chicago
Rome

Chicago, IL

 CST

Rome

 CET

Airport information


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

B Leonardo da Vinci–Fiumicino Airport
City: Rome
Country: Italy Flag of Italy
IATA Code: FCO
ICAO Code: LIRF
Coordinates: 41°48′16″N, 12°15′2″E

Map

Flight map from Chicago to Rome.

Frequent Flyer Miles Calculator

Chicago (ORD) → Rome (FCO).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
4823
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
4823

Round trip?