The flight distance from George Bush Intcntl/Houston Airport (IAH) in Houston, United States to Sihanoukville International Airport (KOS) in Sihanukville, Cambodia is 15,069 kilometers (9,363 miles / 8,136 nautical miles). The estimated flight time for this route is approximately 19h, flying north northwest at a heading of 333°.

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 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 18:15 in Houston, it's 07:15 in Sihanukville. With a 13-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 Sihanukville (KOS) to Houston (IAH) follows a heading of 24° (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 George Bush Intcntl/Houston Airport (IAH) and Sihanoukville International Airport (KOS) detail pages, or use our flight duration calculator to compare other routes.