The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to Taharoa Aerodrome (THH) in Taharoa, New Zealand is 13,911 kilometers (8,644 miles / 7,511 nautical miles). The estimated flight time for this route is approximately 17h, flying west southwest at a heading of 246°.

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 United States with New Zealand. It is an intercontinental flight between North America and Oceania. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 09:15 in Washington, it's 03:15 in Taharoa. With a 18-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 Taharoa (THH) to Washington (IAD) follows a heading of 65° (east 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 Washington Dulles International Airport (IAD) and Taharoa Aerodrome (THH) detail pages, or use our flight duration calculator to compare other routes.