Siem Reap-Angkor International Airport lies in the tropics at 13.37° N, 104.22° E, on Asia/Phnom_Penh time (UTC+7). Tropical airports contend with heat and humidity, both of which thin the air and lengthen takeoff runs, and with convective storms that build fast in the afternoon.
Siem Reap-Angkor International Airport has 1 runway. The longest, 05/23, measures 11,827 ft by 197 ft, which puts the field in the long-haul capable category: widebodies operate comfortably, though the very longest sectors may need a payload trade. The surface is concrete. None of them carry runway lighting, which restricts operations to daylight and good visibility.