# Distance from Kathmandu (KTM) to Montague (SIY)

> 11,777 km · estimated flight time 15h · Ultra-long-haul route.

## Summary

- **Distance**: 11,777 km / 7,318 mi / 6,359 nm
- **Estimated flight time**: 15h
- **Heading**: 21° (north northeast)
- **Return heading**: 335° (north northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Nepal) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -12.75h (When it's 05:33 in Kathmandu, it's 16:48 in Montague)
- **Elevation difference**: 1,739 ft (SIY 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

### [Siskiyou County Airport (SIY)](https://www.flightduration.online/airport/siy-montague-siskiyou-county-airport/1ef266df-388c-6c28-9606-06bb2780ed98)

- City: Montague, United States
- ICAO: KSIY
- Timezone: America/Los_Angeles
- Coordinates: 41.780000, -122.470000
- Elevation: 2,651 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 05:33 in Kathmandu, it's 16:48 in Montague.
With a 12.75-hour time difference, expect significant jet lag.

## Related

- [Tribhuvan International Airport (KTM)](https://www.flightduration.online/airport/ktm-kathmandu-tribhuvan-international-airport/1ef266df-f304-6ec0-afd1-06bb2780ed98)
- [Siskiyou County Airport (SIY)](https://www.flightduration.online/airport/siy-montague-siskiyou-county-airport/1ef266df-388c-6c28-9606-06bb2780ed98)
- [Flight duration calculator](/#calculator)