# Distance from Perth (PER) to St Marys (STQ)

> 18,354 km · estimated flight time 23h · Ultra-long-haul route.

## Summary

- **Distance**: 18,354 km / 11,404 mi / 9,910 nm
- **Estimated flight time**: 23h
- **Heading**: 47° (northeast)
- **Return heading**: 305° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Australia) → United States
- **Intercontinental**: Oceania → North America
- **Time difference**: -12h (When it's 03:33 in Perth, it's 15:33 in St Marys)
- **Elevation difference**: 1,867 ft (STQ is higher than PER)

## Airports

### [Perth International Airport (PER)](https://flightduration.online/airport/per-perth-perth-international-airport/1ef266e0-1765-627e-aa2d-06bb2780ed98)

- City: Perth, Australia
- ICAO: YPPH
- Timezone: Australia/Perth
- Coordinates: -31.940000, 115.970000
- Elevation: 67 ft

### [St Marys Municipal Airport (STQ)](https://flightduration.online/airport/stq-st-marys-st-marys-municipal-airport/1ef266df-31a7-60e8-a173-06bb2780ed98)

- City: St Marys, United States
- ICAO: KOYM
- Timezone: America/New_York
- Coordinates: 41.410000, -78.500000
- Elevation: 1,934 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 03:33 in Perth, it's 15:33 in St Marys.
With a 12-hour time difference, expect significant jet lag.

## Related

- [Perth International Airport (PER)](https://flightduration.online/airport/per-perth-perth-international-airport/1ef266e0-1765-627e-aa2d-06bb2780ed98)
- [St Marys Municipal Airport (STQ)](https://flightduration.online/airport/stq-st-marys-st-marys-municipal-airport/1ef266df-31a7-60e8-a173-06bb2780ed98)
- [Flight duration calculator](/#calculator)