The flight distance from St. Mary's Airport (ISC) in St. Mary's, United Kingdom to Sydney Kingsford Smith International Airport (SYD) in Sydney, Australia is 17,461 kilometers (10,849 miles / 9,428 nautical miles). The estimated flight time for this route is approximately 22h, flying northeast at a heading of 55°.

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 United Kingdom with Australia. It is an intercontinental flight between Europe and Oceania. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 15:54 in St. Mary's, it's 02:54 in Sydney. With a 11-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

The return flight from Sydney (SYD) to St. Mary's (ISC) follows a heading of 321° (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 St. Mary's Airport (ISC) and Sydney Kingsford Smith International Airport (SYD) detail pages, or use our flight duration calculator to compare other routes.