The flight distance from Keflavik International Airport (KEF) in Reykjavik, Iceland to Sydney Kingsford Smith International Airport (SYD) in Sydney, Australia is 16,649 kilometers (10,345 miles / 8,990 nautical miles). The estimated flight time for this route is approximately 21h, flying north at a heading of 10°.

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 Iceland 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 17:33 in Reykjavik, it's 04:33 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 Reykjavik (KEF) follows a heading of 355° (north). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Keflavik International Airport (KEF) and Sydney Kingsford Smith International Airport (SYD) detail pages, or use our flight duration calculator to compare other routes.