The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to Masslo Airport (MZX) in Masslo, Ethiopia is 11,840 kilometers (7,357 miles / 6,393 nautical miles). The estimated flight time for this route is approximately 15h, flying east northeast at a heading of 67°.

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 Ethiopia. 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 22:40 in Washington, it's 06:40 in Masslo. With a 8-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 3,868 feet between the two airports. Masslo Airport sits higher than Washington Dulles International Airport.

The return flight from Masslo (MZX) to Washington (IAD) follows a heading of 314° (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 Washington Dulles International Airport (IAD) and Masslo Airport (MZX) detail pages, or use our flight duration calculator to compare other routes.