The flight distance from Kilwa Masoko Airport (KIY) in Kilwa Masoko, Tanzania to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 15,402 kilometers (9,570 miles / 8,316 nautical miles). The estimated flight time for this route is approximately 19h, flying north northwest at a heading of 341°.

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

Time zone information: When it's 07:49 in Kilwa Masoko, it's 20:49 in Seattle. With a 11-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 Kilwa Masoko (KIY) follows a heading of 28° (north 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 Kilwa Masoko Airport (KIY) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.