The flight distance from Netaji Subhash Chandra Bose International Airport (CCU) in Kolkata, India to South Big Horn County Airport (GEY) in Greybull, United States is 12,359 kilometers (7,680 miles / 6,673 nautical miles). The estimated flight time for this route is approximately 16h, flying north northeast at a heading of 13°.

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 19:06 in Kolkata, it's 06:36 in Greybull. With a 12.5-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 3,926 feet between the two airports. South Big Horn County Airport sits higher than Netaji Subhash Chandra Bose International Airport.

The return flight from Greybull (GEY) to Kolkata (CCU) follows a heading of 344° (north 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 Netaji Subhash Chandra Bose International Airport (CCU) and South Big Horn County Airport (GEY) detail pages, or use our flight duration calculator to compare other routes.