Hey there Ratna,
Check out this
Southern Thailand map On the east peninsula is Samui. See Surat Thani? You can get a
ferry from Surat Thani to Samui and vice versa. From Surat you can very easily jump on a load of different buses to get across to Krabi on the Andaman side (west peninsular coast). From Krabi you can
take a ferry to Phi Phi. Ferries also run from Koh Lanta and Phuket to Phi Phi. Sorry, you want to go the opposite way but it is all the same.
Travel is easy and convenient. When you're there you'll realize that you will have plenty of options to get around. I'm not sure of the
exact travel time but going ferry-bus-ferry should be about 8 to 9 hours. It will be an early start and you should be arriving in time to catch the afternoon ferry either way.
mai bpen rai

no problem
Don't worry, it'll be a piece of cake!
Have a great time with your friends!
