# Distance from Kathmandu (KTM) to Smithton Airport (SIO)

> 9,792 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 9,792 km / 6,085 mi / 5,287 nm
- **Estimated flight time**: 13h
- **Heading**: 139° (southeast)
- **Return heading**: 310° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Nepal) → Australia
- **Intercontinental**: Asia → Oceania
- **Time difference**: +4.25h (When it's 06:52 in Kathmandu, it's 11:07 in Smithton Airport)
- **Elevation difference**: 4,359 ft (SIO is lower than KTM)

## Airports

### [Tribhuvan International Airport (KTM)](https://www.flightduration.online/airport/ktm-kathmandu-tribhuvan-international-airport/1ef266df-f304-6ec0-afd1-06bb2780ed98)

- City: Kathmandu, Nepal
- ICAO: VNKT
- Timezone: Asia/Kathmandu
- Coordinates: 27.700000, 85.360000
- Elevation: 4,390 ft

### [Smithton Airport (SIO)](https://www.flightduration.online/airport/sio-smithton-airport/1ef266e0-1932-6eee-8e2b-06bb2780ed98)

- City: Smithton Airport, Australia
- ICAO: YSMI
- Timezone: Australia/Hobart
- Coordinates: -40.840000, 145.080000
- Elevation: 31 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 06:52 in Kathmandu, it's 11:07 in Smithton Airport.
The 4.25-hour time difference may cause some jet lag.

## Related

- [Tribhuvan International Airport (KTM)](https://www.flightduration.online/airport/ktm-kathmandu-tribhuvan-international-airport/1ef266df-f304-6ec0-afd1-06bb2780ed98)
- [Smithton Airport (SIO)](https://www.flightduration.online/airport/sio-smithton-airport/1ef266e0-1932-6eee-8e2b-06bb2780ed98)
- [Flight duration calculator](/#calculator)