# Distance from Rome (FCO) to Atwater (MER)

> 9,994 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 9,994 km / 6,210 mi / 5,396 nm
- **Estimated flight time**: 13h
- **Heading**: 324° (northwest)
- **Return heading**: 33° (north northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (Italy) → United States
- **Intercontinental**: Europe → North America
- **Time difference**: -9h (When it's 14:02 in Rome, it's 05:02 in Atwater)
- **Elevation difference**: 175 ft (MER is higher than FCO)

## Airports

### [Leonardo Da Vinci (Fiumicino) International Airport (FCO)](https://www.flightduration.online/airport/fco-rome-leonardo-da-vinci-fiumicino-international-airport/1ef266df-5138-6e48-8f07-06bb2780ed98)

- City: Rome, Italy
- ICAO: LIRF
- Timezone: Europe/Rome
- Coordinates: 41.800000, 12.250000
- Elevation: 15 ft

### [Castle Airport (MER)](https://www.flightduration.online/airport/mer-atwater-castle-airport/1ef266df-2a82-6f4c-b75d-06bb2780ed98)

- City: Atwater, United States
- ICAO: KMER
- Timezone: America/Los_Angeles
- Coordinates: 37.400000, -120.600000
- Elevation: 190 ft

## Route notes

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

Time-zone information: When it's 14:02 in Rome, it's 05:02 in Atwater.
With a 9-hour time difference, expect significant jet lag.

## Related

- [Leonardo Da Vinci (Fiumicino) International Airport (FCO)](https://www.flightduration.online/airport/fco-rome-leonardo-da-vinci-fiumicino-international-airport/1ef266df-5138-6e48-8f07-06bb2780ed98)
- [Castle Airport (MER)](https://www.flightduration.online/airport/mer-atwater-castle-airport/1ef266df-2a82-6f4c-b75d-06bb2780ed98)
- [Flight duration calculator](/#calculator)