The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to Mount Cook Airport (MON) in Mount Cook Airport, New Zealand is 14,501 kilometers (9,011 miles / 7,830 nautical miles). The estimated flight time for this route is approximately 18h, flying west southwest at a heading of 241°.

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 07:35 in Washington, it's 01:35 in Mount Cook Airport. 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.

There is a significant elevation difference of 1,841 feet between the two airports. Mount Cook Airport sits higher than Washington Dulles International Airport.

The return flight from Mount Cook Airport (MON) to Washington (IAD) follows a heading of 71° (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 Mount Cook Airport (MON) detail pages, or use our flight duration calculator to compare other routes.