I'm planning on trying to book a trip to PPT (and on to Bora Bora) for a honeymoon trip in 2019.

The route via SCL/IPC is one option, though the IPC-PPT flight is only once a week on a Monday.

The other option I was looking at was the Standard EU->USA East Coast -> USA West Cost -> Honolulu TP run, then taking the weekly Hawaiian airlines flight from HNL->PPT, which If I recall is on a Saturday.