These are all 1 cabin planes. I've yet to get a 319 segment.

Just a note - if you don't have a Diners Club, you may consider one. The Pacific Club (Salones VIP) are in SCL, PMC, and PUQ. If for any reason you end up with any ground time at any of these places, these are member lounges. Free cocktails & beverages, not too much in the snackiecake department, however. Free internet terminals (speed depends on the airport). The SCL lounge has a shower, should you need. If you don't have or want a DC, I don't know the current entrance fee, but last time it was CL$10.000, so its not very expensive (consider US$1 = CL$600). Your flights will also have a complimentary beverage cart (not too many selections - scotch, vino, pre-mixed pisco sour, and soft drinks). Meal services are from pretty good to inedible. I have flown many LA domestic segments and have only had one in the "inedible" department.

Get an aisle seat, and you will be ok. The planes also have IFE.