# Distance from Bucharest (OTP) to Boulder (WBU)

> 9,425 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,425 km / 5,857 mi / 5,089 nm
- **Estimated flight time**: 12h
- **Heading**: 325° (northwest)
- **Return heading**: 32° (north northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (Romania) → United States
- **Intercontinental**: Europe → North America
- **Time difference**: -9h (When it's 15:21 in Bucharest, it's 06:21 in Boulder)
- **Elevation difference**: 4,974 ft (WBU is higher than OTP)

## Airports

### [Henri Coanda International Airport (OTP)](https://flightduration.online/airport/otp-bucharest-henri-coanda-international-airport/1ef266df-5682-65f2-900a-06bb2780ed98)

- City: Bucharest, Romania
- ICAO: LROP
- Timezone: Europe/Bucharest
- Coordinates: 44.570000, 26.100000
- Elevation: 314 ft

### [Boulder Municipal Airport (WBU)](https://flightduration.online/airport/wbu-boulder-boulder-municipal-airport/1ef266df-1024-68d0-9f40-06bb2780ed98)

- City: Boulder, United States
- ICAO: KBDU
- Timezone: America/Denver
- Coordinates: 40.040000, -105.230000
- Elevation: 5,288 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 15:21 in Bucharest, it's 06:21 in Boulder.
With a 9-hour time difference, expect significant jet lag.

## Related

- [Henri Coanda International Airport (OTP)](https://flightduration.online/airport/otp-bucharest-henri-coanda-international-airport/1ef266df-5682-65f2-900a-06bb2780ed98)
- [Boulder Municipal Airport (WBU)](https://flightduration.online/airport/wbu-boulder-boulder-municipal-airport/1ef266df-1024-68d0-9f40-06bb2780ed98)
- [Flight duration calculator](/#calculator)