There is also an official airport bus service, serving destinations in Ao Nang and Krabi Town only. Prices are 100 baht (Krabi Town) – 150 baht (Ao Nang) per person; buses leave 8 – 10 times daily between 8am – 8pm (approximately), or when there are enough passengers to fill them. Tickets can be bought in the arrival hall, at the same booths as the taxi coupons.
위와 같이 안내되어 있는 것을 보아서 시간표가 없는 것이 당연하겠네요.