The flight distance from Chiang Rai International Airport (CEI) in Chiang Rai, Thailand to George Bush Intcntl/Houston Airport (IAH) in Houston, United States is 14,229 kilometers (8,841 miles / 7,683 nautical miles). The estimated flight time for this route is approximately 18h, flying north northeast at a heading of 17°.

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 09:37 in Chiang Rai, it's 21:37 in Houston. 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.

There is a significant elevation difference of 1,184 feet between the two airports. George Bush Intcntl/Houston Airport sits lower than Chiang Rai International Airport.

The return flight from Houston (IAH) to Chiang Rai (CEI) follows a heading of 342° (north 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 George Bush Intcntl/Houston Airport (IAH) detail pages, or use our flight duration calculator to compare other routes.