# Distance from Roma (CIA) to Houston (IAH)

> 9,149 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,149 km / 5,685 mi / 4,940 nm
- **Estimated flight time**: 12h
- **Heading**: 304° (west northwest)
- **Return heading**: 46° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (Italy) → United States
- **Intercontinental**: Europe → North America
- **Time difference**: -7h (When it's 08:02 in Roma, it's 01:02 in Houston)
- **Elevation difference**: 331 ft (IAH is lower than CIA)

## Airports

### [Ciampino Airport (CIA)](https://www.flightduration.online/airport/cia-roma-ciampino-airport/1ef266df-5130-69fa-87ee-06bb2780ed98)

- City: Roma, Italy
- ICAO: LIRA
- Timezone: Europe/Rome
- Coordinates: 41.800000, 12.590000
- Elevation: 427 ft

### [George Bush Intcntl/Houston Airport (IAH)](https://www.flightduration.online/airport/iah-houston-george-bush-intcntlhouston-airport/1ef266df-22d4-6822-bae6-06bb2780ed98)

- City: Houston, United States
- ICAO: KIAH
- Timezone: America/Chicago
- Coordinates: 29.980000, -95.340000
- Elevation: 96 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 08:02 in Roma, it's 01:02 in Houston.
With a 7-hour time difference, expect significant jet lag.

## Related

- [Ciampino Airport (CIA)](https://www.flightduration.online/airport/cia-roma-ciampino-airport/1ef266df-5130-69fa-87ee-06bb2780ed98)
- [George Bush Intcntl/Houston Airport (IAH)](https://www.flightduration.online/airport/iah-houston-george-bush-intcntlhouston-airport/1ef266df-22d4-6822-bae6-06bb2780ed98)
- [Flight duration calculator](/#calculator)