you can fly directly. Bangkok Airways has a flight, which will take you 5 minutes. Or you need to transfer from KRABI. You can go to KRABI by boat or car. It takes more than 3 hours by car, and it takes a long time for the boat. Then from KRABI to Samui, it takes 7-8 hours by car and boat!

plane: Bangkok Airways has flights, which can be booked on Bangkok Airways. The round-trip air ticket is about/person in 1 yuan, and the air ticket can be booked in Phuket, but as far as possible, it can be paid by credit card. There are many flights, so you can choose more.

others: 5 by boat and bus, 3 hours by bus and half a day by boat! The price is similar to that of an airplane.

note: it is strongly recommended to fly, and only a little more than 1 discount tickets can be bought by plane!