The flight distance from Netaji Subhash Chandra Bose International Airport (CCU) in Kolkata, India to Ocean Reef Club Airport (OCA) in Key Largo, United States is 14,544 kilometers (9,037 miles / 7,853 nautical miles). The estimated flight time for this route is approximately 18h, flying north northwest at a heading of 347°.

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

Time zone information: When it's 02:04 in Kolkata, it's 15:34 in Key Largo. With a 10.5-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 Key Largo (OCA) to Kolkata (CCU) follows a heading of 14° (north northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Netaji Subhash Chandra Bose International Airport (CCU) and Ocean Reef Club Airport (OCA) detail pages, or use our flight duration calculator to compare other routes.