The flight distance from Harry Reid International Airport (LAS) in Las Vegas, United States to Udon Thani Airport (UTH) in Udon Thani, Thailand is 12,855 kilometers (7,988 miles / 6,941 nautical miles). The estimated flight time for this route is approximately 16h, flying northwest at a heading of 319°.

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 Thailand. 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 03:52 in Las Vegas, it's 18:52 in Udon Thani. 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.

There is a significant elevation difference of 1,602 feet between the two airports. Udon Thani Airport sits lower than Harry Reid International Airport.

The return flight from Udon Thani (UTH) to Las Vegas (LAS) follows a heading of 33° (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 Harry Reid International Airport (LAS) and Udon Thani Airport (UTH) detail pages, or use our flight duration calculator to compare other routes.