The flight distance from Greymouth Airport (GMN) in Greymouth Airport, New Zealand to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 11,938 kilometers (7,418 miles / 6,446 nautical miles). The estimated flight time for this route is approximately 15h, flying northeast at a heading of 41°.

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

Time zone information: When it's 19:01 in Greymouth Airport, it's 22:01 in Seattle. With a 21-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 Seattle (SEA) to Greymouth Airport (GMN) follows a heading of 225° (southwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Greymouth Airport (GMN) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.