Everything delayed today (lately)
 

I went through the HKIA app today, and apart from a few that got delayed for more than an hour, most flights left on time or within 30 mins after. That's pretty normal.

ATC congestion in HK is also a factor.

Not trying to add fuel to the fire as I've rarely experience significant delays, however having just flown to KIX and back, I was delayed on both segments, with the return Captain, specifically mentioning ATC. My mom was also travelling back from KIX but on HK Express, her flight was originally scheduled to depart later than mine, but actually ended up departing ahead of time whereas my take off was over an hour later (her baggage wait was way longer than mine).

Hong Kong is next to China. (technically part of China). Our airspace is not really our own, and China does not give a [word that gets deleted] about commercial airlines. They do what they like. Thus HK airport regularly has limitations on where planes can fly which cause delays.

it's geography.

Yep, if you look at the flight routes from the east, often times, the flight will travel over taiwan and make a dog-legged pattern into hkg for arrival.

I'm pretty sure that it actually is your own...hence that silly 15k foot handoff rule.

Furthermore, overflying China between HK and Japan seems to be quite rare.