The flight distance from Perth International Airport (PER) in Perth, Australia to St Marys Municipal Airport (STQ) in St Marys, United States is 18,354 kilometers (11,404 miles / 9,910 nautical miles). The estimated flight time for this route is approximately 23h, flying northeast at a heading of 47°.

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.

This is an international route connecting Australia with United States. It is an intercontinental flight between Oceania and North America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 03:37 in Perth, it's 14:37 in St Marys. With a 13-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 1,867 feet between the two airports. St Marys Municipal Airport sits higher than Perth International Airport.

The return flight from St Marys (STQ) to Perth (PER) follows a heading of 305° (northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Perth International Airport (PER) and St Marys Municipal Airport (STQ) detail pages, or use our flight duration calculator to compare other routes.