# Distance from Adelaide (ADL) to Union Island (UNI)

> 16,821 km · estimated flight time 21h · Ultra-long-haul route.

## Summary

- **Distance**: 16,821 km / 10,452 mi / 9,083 nm
- **Estimated flight time**: 21h
- **Heading**: 136° (southeast)
- **Return heading**: 216° (southwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Australia) → Saint Vincent
- **Intercontinental**: Oceania → North America
- **Time difference**: -13.5h (When it's 11:37 in Adelaide, it's 22:07 in Union Island)
- **Elevation difference**: 4 ft (UNI is lower than ADL)

## Airports

### [Adelaide International Airport (ADL)](https://www.flightduration.online/airport/adl-adelaide-adelaide-international-airport/1ef266e0-1682-610e-a772-06bb2780ed98)

- City: Adelaide, Australia
- ICAO: YPAD
- Timezone: Australia/Adelaide
- Coordinates: -34.950000, 138.530000
- Elevation: 20 ft

### [Union Island International Airport (UNI)](https://www.flightduration.online/airport/uni-union-island-union-island-international-airport/1ef266df-e292-6308-afea-06bb2780ed98)

- City: Union Island, Saint Vincent
- ICAO: TVSU
- Timezone: America/St_Vincent
- Coordinates: 12.600000, -61.410000
- Elevation: 16 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 11:37 in Adelaide, it's 22:07 in Union Island.
With a 13.5-hour time difference, expect significant jet lag.

## Related

- [Adelaide International Airport (ADL)](https://www.flightduration.online/airport/adl-adelaide-adelaide-international-airport/1ef266e0-1682-610e-a772-06bb2780ed98)
- [Union Island International Airport (UNI)](https://www.flightduration.online/airport/uni-union-island-union-island-international-airport/1ef266df-e292-6308-afea-06bb2780ed98)
- [Flight duration calculator](/#calculator)