Long Tail Boat by illa
We stayed on Railay Beach, which is only accessable by boat. The closest way is from Ao Lang Beach, where there are quite a lot of boats waiting normally. It's 50 Baht/person from Ao Lang to Railay and a 15-20 minute trip. If you are in a hurry and don't want to wait for more passengers, they charge you 200 Baht for one trip. Once after visiting Tiger Cave Temple, we decided to get back to Railay from Krabi. We were told it's 70 Baht/person if we want to wait for more passengers (They didn't say how many more would make them pleased to go), however, "if you are really in a hurry and don't want to wait---obviously it's quite late now and the chances for more passengers are very rare---you can also take the boat by 700 Baht".
I still haven't figured out what the logic is to calculate. From Ao Lang, it's 50B/person and 200B/boat, but from Krabi, it's 70B/person 700B/boat.
Either from Ao Lang or from Railay, when you board, you have to go into the water first, and sometimes you have to go deep. It's much better if you wear shorts or swimming wear to get on the boat.