The flight distance from RAF Ascension Island (ASI) in Ascension Island, SH to Narita International Airport (NRT) in Tokyo, Japan is 16,002 kilometers (9,943 miles / 8,640 nautical miles). The estimated flight time for this route is approximately 20h, flying northeast at a heading of 36°.

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 SH with Japan. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 22:46 in Ascension Island, it's 07:46 in Tokyo. With a 9-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 Tokyo (NRT) to Ascension Island (ASI) follows a heading of 314° (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 RAF Ascension Island (ASI) and Narita International Airport (NRT) detail pages, or use our flight duration calculator to compare other routes.