We are a family of 4 and our flight leaving Hong Kong is at 19:00.

From your hotel, you are suggested to take a taxi to Shangri-La Hotel first. After arriving, you can find several direct buses that can take you to HKIA. The bus schedules are from 06:20 to 18:40. The ticket fare is CNY 200 per person. And the bus takes around 2 hours. Besides, you need to arrive at the airport at least 2 hours in advance. Thus, you can calculate the time according to this.