Cathay Pacific's direct flights from Toronto Pearson (YYZ) to Hong Kong International (HKG) arrive at Terminal 1.
Terminal 1 is the main passenger terminal at HKG, handling all major international carriers. It's connected to the Airport Express (24 min to Central), taxis, buses, and the SkyPier ferry terminal for onward travel to the Pearl River Delta.
Departure from Toronto is also from Terminal 3 (YYZ).