The flight distance from Chek Lap Kok International Airport (HKG) in Hong Kong, Hong Kong to St. Mary's Airport (ISC) in St. Mary's, United Kingdom is 10,067 kilometers (6,255 miles / 5,436 nautical miles). The estimated flight time for this route is approximately 13h, flying northwest at a heading of 326°.

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

Time zone information: When it's 21:46 in Hong Kong, it's 13:46 in St. Mary's. With a 8-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 St. Mary's (ISC) to Hong Kong (HKG) follows a heading of 53° (northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Chek Lap Kok International Airport (HKG) and St. Mary's Airport (ISC) detail pages, or use our flight duration calculator to compare other routes.