I've been watching ads for the SFK-JFK flights the last few days here in Guam. I was impressed by that distance in on straight shot. I looked up some of the distances of routed people mentioned. Any of them are a long time to spend on a plane.

From To Distance
SIN (01°21'21"N 103°59'15"E) JFK (40°38'23"N 73°46'44"W) 9537 mi
SIN (01°21'21"N 103°59'15"E) LAX (33°56'33"N 118°24'29"W) 8770 mi
EWR (40°41'33"N 74°10'07"W) HKG (22°18'32"N 113°54'53"E) 8065 mi
ATL (33°38'26"N 84°25'37"W) JNB (26°08'21"S 28°14'46"E) 8439 mi
SYD (33°56'46"S 151°10'38"E) LAX (33°56'33"N 118°24'29"W) 7488 mi