The flight distance from Chiang Mai International Airport (CNX) in Chiang Mai, Thailand to San Francisco International Airport (SFO) in San Francisco, United States is 12,399 kilometers (7,705 miles / 6,695 nautical miles). The estimated flight time for this route is approximately 16h, flying northeast at a heading of 34°.

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 12:50 in Chiang Mai, it's 21:50 in San Francisco. 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 1,023 feet between the two airports. San Francisco International Airport sits lower than Chiang Mai International Airport.

The return flight from San Francisco (SFO) to Chiang Mai (CNX) follows a heading of 318° (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 Mai International Airport (CNX) and San Francisco International Airport (SFO) detail pages, or use our flight duration calculator to compare other routes.