YIH and SIN are approximately 2,077 miles apart by great-circle distance.
No. Roame's current schedule feed lists service with stops from YIH to SIN, but no nonstop service.
Airlines represented in the current schedule are Hainan Airlines (HU).
Aircraft listed in the current schedule include 737, Boeing 737-800 (738) and Boeing 737-800 Winglets (73H).