The flight distance from Chiang Rai International Airport (CEI) in Chiang Rai, Thailand to Harry Reid International Airport (LAS) in Las Vegas, United States is 12,777 kilometers (7,939 miles / 6,899 nautical miles). The estimated flight time for this route is approximately 16h, flying north northeast at a heading of 31°.

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 Thailand 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 16:46 in Chiang Rai, it's 01:46 in Las Vegas. With a 15-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 Las Vegas (LAS) to Chiang Rai (CEI) follows a heading of 323° (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 Chiang Rai International Airport (CEI) and Harry Reid International Airport (LAS) detail pages, or use our flight duration calculator to compare other routes.