# Distance from Clayton (CAO) to Kathmandu (KTM)

> 12,827 km · estimated flight time 16h · Ultra-long-haul route.

## Summary

- **Distance**: 12,827 km / 7,970 mi / 6,926 nm
- **Estimated flight time**: 16h
- **Heading**: 352° (north)
- **Return heading**: 8° (north)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Nepal
- **Intercontinental**: North America → Asia
- **Time difference**: +11.75h (When it's 10:55 in Clayton, it's 22:40 in Kathmandu)
- **Elevation difference**: 580 ft (KTM is lower than CAO)

## Airports

### [Clayton Municipal Airpark (CAO)](https://www.flightduration.online/airport/cao-clayton-clayton-municipal-airpark/1ef266df-1303-6cfe-b7f8-06bb2780ed98)

- City: Clayton, United States
- ICAO: KCAO
- Timezone: America/Denver
- Coordinates: 36.450000, -103.150000
- Elevation: 4,970 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 10:55 in Clayton, it's 22:40 in Kathmandu.
With a 11.75-hour time difference, expect significant jet lag.

## Related

- [Clayton Municipal Airpark (CAO)](https://www.flightduration.online/airport/cao-clayton-clayton-municipal-airpark/1ef266df-1303-6cfe-b7f8-06bb2780ed98)
- [Tribhuvan International Airport (KTM)](https://www.flightduration.online/airport/ktm-kathmandu-tribhuvan-international-airport/1ef266df-f304-6ec0-afd1-06bb2780ed98)
- [Flight duration calculator](/#calculator)