I have flown this route & many others on LAN throughout Argentina as a CO nonrev over the last couple of years & have never had any troubles with the exception of COR & that was when LAN had just started service out of BUE & the agents told me CO had no interline agreement & I explained to them we did & why would the LA agents @ BUE let me fly to COR if we didn't ? Well they weren't sold on that & expected me to pay for a ticket so I said OK & went over to Aerolineas Argentinas/Austral & bought a OW $75 ticket. Except for that I've never had a problem with LA in Argentina. I've also flown AR a couple of times & they've really turned themselves around for the better ! Check out BRC - San Carlos de Barilochi during the summer & do the Seven lakes drive, well worth it !