Hidden Thailand
It's easy to twin centre with Krabi, its bigger mainland sister to the north, and although Koh Lanta is an island the transfer buses use two ferries to get there each of which takes no more than five minutes and run numerous times per hour.
I stayed at the Rawi Warin Resort and Spa which is set into the hillside down to a sandy beach with few tourists. It's a good base and less expensive than properties of a similar standard in the more popular resorts.
It's possible to visit the Phi Phi Island on a day trip by boat if the mood takes you and there are numerous alternative excursion possibilities.
Flights to Krabi from Bangkok take an hour and 20 minutes and operate 5 times a day - most hotels on Koh Lanta offer a meet and greet service to take you straight to your hotel.