# Distance from Adelaide (ADL) to Gaithersburg (GAI)

> 16,833 km · estimated flight time 21h · Ultra-long-haul route.

## Summary

- **Distance**: 16,833 km / 10,460 mi / 9,089 nm
- **Estimated flight time**: 21h
- **Heading**: 71° (east northeast)
- **Return heading**: 267° (west)
- **Classification**: Ultra-long-haul
- **Type**: International (Australia) → United States
- **Intercontinental**: Oceania → North America
- **Time difference**: -13.5h (When it's 12:57 in Adelaide, it's 23:27 in Gaithersburg)
- **Elevation difference**: 519 ft (GAI is higher 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

### [Montgomery County Airpark (GAI)](https://www.flightduration.online/airport/gai-gaithersburg-montgomery-county-airpark/1ef266df-1d9e-6f2e-a3da-06bb2780ed98)

- City: Gaithersburg, United States
- ICAO: KGAI
- Timezone: America/New_York
- Coordinates: 39.170000, -77.170000
- Elevation: 539 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 12:57 in Adelaide, it's 23:27 in Gaithersburg.
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)
- [Montgomery County Airpark (GAI)](https://www.flightduration.online/airport/gai-gaithersburg-montgomery-county-airpark/1ef266df-1d9e-6f2e-a3da-06bb2780ed98)
- [Flight duration calculator](/#calculator)