The flight distance from Cancun International Airport (CUN) in Cancun, Mexico to Siem Reap Angkor International Airport (SAI) in Siem Reap, Cambodia is 16,001 kilometers (9,943 miles / 8,640 nautical miles). The estimated flight time for this route is approximately 20h, flying north northwest at a heading of 341°.

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 Mexico with Cambodia. 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 14:07 in Cancun, it's 02:07 in Siem Reap. With a 12-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 Siem Reap (SAI) to Cancun (CUN) follows a heading of 18° (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 Cancun International Airport (CUN) and Siem Reap Angkor International Airport (SAI) detail pages, or use our flight duration calculator to compare other routes.