Flight time between HKG and John F. Kennedy?

A random search for flights from Hong Kong (HKG) to New York Kennedy (JFK) shows:

OPTION 1: 15hr 45min Nonstop

HKG - JFK Cathay Pacific Airways Flt 830 Dep 09:25am 23Apr,Fri

Flight Duration: 15hr 45min

OPTION 2: 18hr 10min via Shanghai Pu Dong (PVG) [Cheaper Option]

HKG - PVG China Eastern Airlines Flt 726 Dep 08:05am 23Apr,Fri

PVG - JFK China Eastern Airlines Flt 587 Dep 12:00pm 23Apr,Fri

Flight Duration: 16hr 30min; Layover Time: 1hr 40min; Total Trip Time: 18hr 10min