Getting from / going to Ko Phi Phi.
The most common way to get to Koh Lipe from Ko Lanta is by ferries operated by Tigerline and Phuket Ferry. They generally leave Phuket, via Ko Phi Phi, or Krabi and Ko Lanta to Ko Lipe. Check their timetables for seasonal differences and connecting transport.
It is also possible to get a speedboat with Bundhaya Speedboat.