I've never done int'l to int'l at SCL. I take it no immigration necessary in Chile -- I suppose I shouldn't worry since my Chilean reciprocity fee is paid up for the duration of my passport -- and luggage can be checked all the way through, but probably not boarding passes issued for the entire trip? I'm assuming AA can't issue PZ boarding passes and PZ can't do the same for AA on the return trip.

Yes, they are LA flight numbers on PZ metal for SCL-ASU-SCL.

And does TAM Mercosur still have a musician serenading the passengers with a Paraguayan harp at the boarding gate in ASU? I always liked that. Where would you find such a touch but in Paraguay? ^