The flight distance from St Gallen Altenrhein Airport (ACH) in Altenrhein, Switzerland to Chek Lap Kok International Airport (HKG) in Hong Kong, Hong Kong is 9,211 kilometers (5,723 miles / 4,973 nautical miles). The estimated flight time for this route is approximately 12h, flying east northeast at a heading of 65°.

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

Time zone information: When it's 18:08 in Altenrhein, it's 01:08 in Hong Kong. With a 7-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 1,278 feet between the two airports. Chek Lap Kok International Airport sits lower than St Gallen Altenrhein Airport.

The return flight from Hong Kong (HKG) to Altenrhein (ACH) follows a heading of 319° (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 Gallen Altenrhein Airport (ACH) and Chek Lap Kok International Airport (HKG) detail pages, or use our flight duration calculator to compare other routes.