Air Miles Calculator

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

Distance from Leonardo da Vinci–Fiumicino Airport to O'Hare International 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 Leonardo da Vinci–Fiumicino Airport (FCO) to 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.

Time Difference

Rome
Chicago

Rome

 CET

Chicago, IL

 CST

Airport information


A 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

B 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

Map

Flight map from Rome to Chicago.

Frequent Flyer Miles Calculator

Rome (FCO) → Chicago (ORD).

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?