Answered by Susanne from Australia | Feb. 03, 2016 00:34
There are only ferries that transport between HKIA and Humen Port. The schedules are 10:30, 12:30, 14:00, 16:30 and 18:30. It costs 350 HKD per person.
If you leaving from downtown area, you are suggested to take a train from Hung Hom Railway Station, and arrive at Changping Railway Station. The schedules are from 07:25 to 20:01. It takes around an hour on the way. The first class seat is 160 HKD.