The flight distance from Singapore Changi International Airport (SIN) in Singapore, Singapore to Kelly Field (SKF) in San Antonio, United States is 15,840 kilometers (9,843 miles / 8,553 nautical miles). The estimated flight time for this route is approximately 20h, flying north northeast at a heading of 33°.

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 Singapore 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 22:35 in Singapore, it's 08:35 in San Antonio. With a 14-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 San Antonio (SKF) to Singapore (SIN) follows a heading of 321° (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 Singapore Changi International Airport (SIN) and Kelly Field (SKF) detail pages, or use our flight duration calculator to compare other routes.