Easy if your up near Clark - Cebupac have a daily HKG flight at 7am and most days a second one in afternoon.
CathayDragon schedule to unreliable, only ops 3 days a week
From Manila can be hit and miss, Inbound delays from HKG effect return departure, coupled with rainy season slowing everything up, and not forgetting the nightmare of MNL ATC , remember T3 departures usually involve a runway crossing if departing from bay end.
Flights can be seasonal with loads , if planning to do it staff travel , certain times of day and week and year are a real struggle,
Avoid THU and FRI evening arrivals into MNL , traffic can be gridlock.
Having said that its possible, Quite a few Fedex and UPS drivers do the commute from CRK to HKG then onto CAN and SHZ