Traveling by plane guarantees the fastest time to get from Macau Outer Harbour Terminal, ferry to Hong Kong Airport Sky Pier, ferry. The estimated Macau Outer Harbour Terminal, ferry to Hong Kong Airport Sky Pier, ferry travel time is 6h 15m. Keep in mind, however, that getting to the airport, checking-in, and passing through security checks will take some time - it’s better to come to the airport at least an hour in advance if you are flying domestically and two hours in advance if it is an international flight.
The trip duration from Macau Outer Harbour Terminal, ferry and Hong Kong Airport Sky Pier, ferry is more or less the same whichever airline you choose to fly.