How long is the flight from Singapore to Riyadh?

A random search for flights from Singapore (SIN) to Riyadh (RUH) shows:

OPTION 1: 11hr 30min via Dubai (DXB)
SIN - DXB Emirates Airlines Flt 433 Dep 09:40am 20Nov,Fri
DXB - RUH Saudi Arabian Airlines Flt 559 Dep 03:15pm 20Nov,Fri
Flight Duration: 9hr 15min; Layover Time: 2hr 15min; Total Trip Time: 11hr 30min

OPTION 2: 12hr 10min via Abu Dhabi (AUH)
SIN - AUH Etihad Airways Flt 473 Dep 07:40pm 19Nov,Thu
AUH - RUH Etihad Airways Flt 315 Dep 02:00am 20Nov,Fri
Flight Duration: 9hr 45min; Layover Time: 2hr 25min; Total Trip Time: 12hr 10min