# Distance from Kathmandu (KTM) to Castries (SLU)

> 14,127 km · estimated flight time 18h · Ultra-long-haul route.

## Summary

- **Distance**: 14,127 km / 8,778 mi / 7,628 nm
- **Estimated flight time**: 18h
- **Heading**: 318° (northwest)
- **Return heading**: 38° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (Nepal) → Saint Lucia
- **Intercontinental**: Asia → North America
- **Time difference**: -9.75h (When it's 09:31 in Kathmandu, it's 23:46 in Castries)
- **Elevation difference**: 4,368 ft (SLU 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

### [George F. L. Charles Airport (SLU)](https://www.flightduration.online/airport/slu-castries-george-f-l-charles-airport/1ef266df-e048-6ec6-bfdb-06bb2780ed98)

- City: Castries, Saint Lucia
- ICAO: TLPC
- Timezone: America/St_Lucia
- Coordinates: 14.020000, -60.990000
- Elevation: 22 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 09:31 in Kathmandu, it's 23:46 in Castries.
With a 9.75-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)
- [George F. L. Charles Airport (SLU)](https://www.flightduration.online/airport/slu-castries-george-f-l-charles-airport/1ef266df-e048-6ec6-bfdb-06bb2780ed98)
- [Flight duration calculator](/#calculator)