The flight distance from Bandaranaike International Apt Colombo Airport (CMB) in Colombo, Sri Lanka to Roundup Airport (RPX) in Roundup, United States is 13,990 kilometers (8,693 miles / 7,554 nautical miles). The estimated flight time for this route is approximately 17h, flying north at a heading of 7°.

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 Sri Lanka 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 20:35 in Colombo, it's 08:05 in Roundup. 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 3,460 feet between the two airports. Roundup Airport sits higher than Bandaranaike International Apt Colombo Airport.

The return flight from Roundup (RPX) to Colombo (CMB) follows a heading of 350° (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 Bandaranaike International Apt Colombo Airport (CMB) and Roundup Airport (RPX) detail pages, or use our flight duration calculator to compare other routes.