The flight distance from Hartsfield - Jackson Atlanta International Airport (ATL) in Atlanta, United States to Denis Island Airport (DEI) in Denis Island, Seychelles is 14,720 kilometers (9,146 miles / 7,948 nautical miles). The estimated flight time for this route is approximately 18h, flying east northeast at a heading of 60°.

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 Seychelles. 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 03:46 in Atlanta, it's 12:46 in Denis Island. With a 9-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 1,016 feet between the two airports. Denis Island Airport sits lower than Hartsfield - Jackson Atlanta International Airport.

The return flight from Denis Island (DEI) to Atlanta (ATL) 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 Hartsfield - Jackson Atlanta International Airport (ATL) and Denis Island Airport (DEI) detail pages, or use our flight duration calculator to compare other routes.