The flight distance from Dehradun Airport (DED) in Dehradun, India to Sydney Kingsford Smith International Airport (SYD) in Sydney, Australia is 10,462 kilometers (6,501 miles / 5,649 nautical miles). The estimated flight time for this route is approximately 13h, flying southeast at a heading of 127°.

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

Time zone information: When it's 01:07 in Dehradun, it's 06:37 in Sydney. The 5.5-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 1,810 feet between the two airports. Sydney Kingsford Smith International Airport sits lower than Dehradun Airport.

The return flight from Sydney (SYD) to Dehradun (DED) follows a heading of 304° (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 Dehradun Airport (DED) and Sydney Kingsford Smith International Airport (SYD) detail pages, or use our flight duration calculator to compare other routes.