# Distance from Helena (HLN) to Nairobi (NBO)

> 14,146 km · estimated flight time 18h · Ultra-long-haul route.

## Summary

- **Distance**: 14,146 km / 8,790 mi / 7,638 nm
- **Estimated flight time**: 18h
- **Heading**: 40° (northeast)
- **Return heading**: 334° (north northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Kenya
- **Intercontinental**: North America → Africa
- **Time difference**: +9h (When it's 01:00 in Helena, it's 10:00 in Nairobi)
- **Elevation difference**: 1,453 ft (NBO is higher than HLN)

## Airports

### [Helena Regional Airport (HLN)](https://www.flightduration.online/airport/hln-helena-helena-regional-airport/1ef266df-20d7-6808-b3f9-06bb2780ed98)

- City: Helena, United States
- ICAO: KHLN
- Timezone: America/Denver
- Coordinates: 46.610000, -111.980000
- Elevation: 3,877 ft

### [Jomo Kenyatta International Airport (NBO)](https://www.flightduration.online/airport/nbo-nairobi-jomo-kenyatta-international-airport/1ef266de-ec1d-68ec-a027-06bb2780ed98)

- City: Nairobi, Kenya
- ICAO: HKJK
- Timezone: Africa/Nairobi
- Coordinates: -1.320000, 36.930000
- Elevation: 5,330 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 01:00 in Helena, it's 10:00 in Nairobi.
With a 9-hour time difference, expect significant jet lag.

## Related

- [Helena Regional Airport (HLN)](https://www.flightduration.online/airport/hln-helena-helena-regional-airport/1ef266df-20d7-6808-b3f9-06bb2780ed98)
- [Jomo Kenyatta International Airport (NBO)](https://www.flightduration.online/airport/nbo-nairobi-jomo-kenyatta-international-airport/1ef266de-ec1d-68ec-a027-06bb2780ed98)
- [Flight duration calculator](/#calculator)