The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to Rio Mayo Airport (ROY) in Rio Mayo, Argentina is 9,435 kilometers (5,863 miles / 5,094 nautical miles). The estimated flight time for this route is approximately 12h, flying south at a heading of 175°.

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

Time zone information: When it's 04:54 in Washington, it's 06:54 in Rio Mayo.

There is a significant elevation difference of 1,472 feet between the two airports. Rio Mayo Airport sits higher than Washington Dulles International Airport.

The return flight from Rio Mayo (ROY) to Washington (IAD) follows a heading of 354° (north). 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 Rio Mayo Airport (ROY) detail pages, or use our flight duration calculator to compare other routes.