The flight distance from Boeing Field/King County International Airport (BFI) in Seattle, United States to Mwalimu Julius K. Nyerere International Airport (DAR) in Dar es Salaam, Tanzania is 15,166 kilometers (9,424 miles / 8,189 nautical miles). The estimated flight time for this route is approximately 19h, flying north northeast at a heading of 27°.

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

Time zone information: When it's 23:54 in Seattle, it's 10:54 in Dar es Salaam. 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 Dar es Salaam (DAR) to Seattle (BFI) follows a heading of 342° (north 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 Boeing Field/King County International Airport (BFI) and Mwalimu Julius K. Nyerere International Airport (DAR) detail pages, or use our flight duration calculator to compare other routes.