thanks folks - I had seen the Air Tahiti Nui flights from CDG but I am probably getting to LAX via stops elsewhere in the USA and Canada
LAX-PPT is only the last part of the trip
A RTW flight might work but it starts getting complicated as I then have to go via Japan, Sydney or Aukland on the way back
The Utube videos are pretty useful - the seats look pretty standard but the general service and food looks quite good
Now to negotiate with InHuman resources whose general idea of long haul is Marbella with Ryanair ..............