Originally Posted by MiamiBeach
When LAN operates a 3-class plane as 2-class, J passengers occupy both F and J seats, and Y passengers occupy Y seats. You may be thinking of AA putting Y passengers in Y and J, but LAN definitely doesn't do that and I don't think they ever did.
I think they have in the past if there are just a few J pax. I was once on a flight (when they had 2 cabin service w/in Chile) SCL/PUQ on a 767 and was the only J pax, and was put in row 1, and there were some Y pax in the J cabin. But this was in late 2001.