We went last year and it was about $ 1200 from Lax. Olivia does not charter the whole plane. They use AIr Tahiti Nui and we were on the same plane as Olivia guests for about $ 200 less per person. Air Tahiti Nui is also a code share partner with several airlines in case you have frequent flier miles you can use. I have been watching the airfares myself and it looks like it is running about $ 1300 this year. The other advantage we found doing itself ourselves was that we were able to get from our home airport, San Francissc, for no additional cost. The other cost you might want to think about is the extra day on either side. The way the flights come and go out of Papette almost requires you to come a day early. The ship waited at least an hour for late arrivals on our departure day which must have been very stressful for those travellig on that plane. Going the day before gives you an opportunity to enjoy Pappette and the resort they use.
Olivia's package is just from LAX or JFK.
Tahiti is incredbile and well worth splurging. We booked to go back as soon as Oliva posted the trip.