EWR is one of the 14hr exception cities, so make that 15hrs. I'm with you on preferring the airport hotel though.

14 HOUR EXCEPTION CITIES Block to Block times- LHR 16, JFK,15, IAH 15, SAL 15, DEN 15, EWR 15, IAD 14, 16:59 Hyatt Reston/IAD 17+ Marriott Washington, MEX 16, ORD 16.