For directions to and from Bethany, follow the links below. You may view, download, save (iBooks/ Android apps) and print these files for your reference.
You will first though need to take a ferry over to Cheung Chau island, from either Central (on Hong Kong Island) or Mui Wo (south Lantau Island, the airport is on North side of Lantau):
From Central Pier 5 - ordinary ferry takes approx. 55 minutes, fast ferry approx. 35 minutes. They operate twice per hour during daytime.
Note that 16:45 ferry (Mon-Sat) is the last one to take if you wish to join dinner (Mon-Sat) at 18:00. Fares and times are different on Sundays and Public Holidays, please check when planning your journey to Bethany.
From Mui Wo (Inter-Islands ferry) - approx. 35-45 minutes, and operates every 2 hours.