The flight distance from Hartsfield - Jackson Atlanta International Airport (ATL) in Atlanta, United States to Netaji Subhash Chandra Bose International Airport (CCU) in Kolkata, India is 13,711 kilometers (8,519 miles / 7,403 nautical miles). The estimated flight time for this route is approximately 17h, flying north at a heading of 8°.

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

Time zone information: When it's 12:18 in Atlanta, it's 21:48 in Kolkata. With a 9.5-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 1,010 feet between the two airports. Netaji Subhash Chandra Bose International Airport sits lower than Hartsfield - Jackson Atlanta International Airport.

The return flight from Kolkata (CCU) to Atlanta (ATL) follows a heading of 353° (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 Hartsfield - Jackson Atlanta International Airport (ATL) and Netaji Subhash Chandra Bose International Airport (CCU) detail pages, or use our flight duration calculator to compare other routes.