Originally Posted by
Kiwi Flyer
Only at certain times of year and on certain routings. Sometimes transroute is polar and sometimes via europe.
I believe only SQ 21/22 (EWR~SIN~EWR) will change between transpolar and europe route
SQ 37 (LAX~SIN) is always a very long night flight even in summer, and SQ 38 (SIN~LAX) is with short on-route night only.