How far is Ontario, CA, from Rome?

The distance between Rome (Ciampino–G. B. Pastine International Airport) and Ontario (Ontario International Airport) is 6333 miles / 10192 kilometers / 5503 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)

• 6332.912 miles
• 10191.833 kilometers
• 5503.150 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

• 6318.819 miles
• 10169.154 kilometers
• 5490.904 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 Ciampino–G. B. Pastine International Airport to Ontario International Airport is 12 hours and 29 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 Ciampino–G. B. Pastine International Airport (CIA) and Ontario International Airport (ONT)

On average, flying from Rome to Ontario generates about 762 kg of CO2 per passenger, and 762 kilograms equals 1 680 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 Ciampino–G. B. Pastine International Airport (CIA) and Ontario International Airport (ONT).

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