How far is Ontario, CA, from Rome?

The distance between Rome (Leonardo da Vinci–Fiumicino Airport) and Ontario (Ontario International Airport) is 6321 miles / 10173 kilometers / 5493 nautical miles.

Distance from Rome to Ontario

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

Vincenty's formula (applied above)

• 6321.374 miles
• 10173.265 kilometers
• 5493.123 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

• 6307.300 miles
• 10150.615 kilometers
• 5480.893 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 Ontario?

The estimated flight time from Leonardo da Vinci–Fiumicino Airport to Ontario International Airport is 12 hours and 28 minutes.

What is the time difference between Rome and Ontario?

The time difference between Rome and Ontario is 9 hours. Ontario is 9 hours behind Rome.

Flight carbon footprint between Leonardo da Vinci–Fiumicino Airport (FCO) and Ontario International Airport (ONT)

On average, flying from Rome to Ontario generates about 760 kg of CO2 per passenger, and 760 kilograms equals 1 677 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Rome to Ontario

See the map of the shortest flight path between Leonardo da Vinci–Fiumicino Airport (FCO) and Ontario International Airport (ONT).

Airport information

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

Destination	Ontario International Airport
City:	Ontario, CA
Country:	United States
IATA Code:	ONT
ICAO Code:	KONT
Coordinates:	34°3′21″N, 117°36′3″W