# Distance from Watertown (ART) to Kathmandu (KTM)

> 11,821 km · estimated flight time 15h · Ultra-long-haul route.

## Summary

- **Distance**: 11,821 km / 7,345 mi / 6,383 nm
- **Estimated flight time**: 15h
- **Heading**: 17° (north northeast)
- **Return heading**: 346° (north northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Nepal
- **Intercontinental**: North America → Asia
- **Time difference**: +9.75h (When it's 17:35 in Watertown, it's 03:20 in Kathmandu)
- **Elevation difference**: 4,059 ft (KTM is higher than ART)

## Airports

### [Watertown International Airport (ART)](https://www.flightduration.online/airport/art-watertown-watertown-international-airport/1ef266df-0ed3-6652-a8b5-06bb2780ed98)

- City: Watertown, United States
- ICAO: KART
- Timezone: America/New_York
- Coordinates: 43.990000, -76.020000
- Elevation: 331 ft

### [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

## 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 17:35 in Watertown, it's 03:20 in Kathmandu.
With a 9.75-hour time difference, expect significant jet lag.

## Related

- [Watertown International Airport (ART)](https://www.flightduration.online/airport/art-watertown-watertown-international-airport/1ef266df-0ed3-6652-a8b5-06bb2780ed98)
- [Tribhuvan International Airport (KTM)](https://www.flightduration.online/airport/ktm-kathmandu-tribhuvan-international-airport/1ef266df-f304-6ec0-afd1-06bb2780ed98)
- [Flight duration calculator](/#calculator)