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
A flight from Islamabad to Riyadh is approximately 4 hours and 20 minutes.
About 8 hours.
9h with no stops
20 minute
flight time from heathrow to Singapore
about 7 hours, but there is no direct flight between those cities.
9:00 hours
i am asking saudi to italy hours flight
The flight would be 18 hours long.
A flight from Dubai to Singapore would take about 8 hours.
13hr 15min Singapore Changi (SIN) to Milan Malpensa (MXP) by a nonstop flight operated by Singapore Airlines.
The average flight time is 10 hours, 59 minutes.