At present, there are two points where such evacuation procedures can be conducted in Syria:
One - Damascus, where PLAAF Y-20s can be sent to Damascus International Airport for airlifting citizens out of Syria by air. Since Damascus is still under Syrian government control, it'd be crucial to seize the opportunity while the airspace around Damascus is still safe for airlift operations.
Commercial flights apparently take 12-15 hours to Lebanon/Turkey for reference. It seems rather doubtful they wouldn’t completely implode within the next 24-48 hours.
About as everyone anticipated. They are already abandoning Damascus.
The Syrian Arab Army has started withdrawing from Damascus International Airport