Yep, LAN is flying to PPT. The flight departs from Santiago, stops at Easter Island then takes off again to PPT.
PPT's runway is built on the sea. The first time I landed at PPT in a French Air Force DC8 (I was 6) I was so scared...because all you see is water until the aircraft touches down.
744 once dived into the lagoon after landing...immat F-GITA, the aircraft has been repaired and is now known as the "GITAnic" lol.
Have fun in French Polynesia ! This place is full of amazing islands other than Bora Bora: Raiatea/Tahaa, Huahine, Tetiaroa (a small atoll not far from Tahiti which was owned by Marlon Brando), Maupiti...also don't forget Rangiroa in the Tuamotu islands !
Enjoy the time you spend there, Tahitians are amazing people.