Air companies covering this route are LAN Chile, Ladeco, Avant, and National. Independent trippers might prefer to arrange their own land trip from Temuco airport. They will find a few options there. Eight to ten passanger minivans which will take you to the exact address you go. They do not take reservations in advance, typically.
Someone has to go there and physically buy the ticket.
This can be done well in advance, however. This buses depart from the modern and handy Terminal Los Heroes, located on La Alameda near the metro station Los Heroes. This buses also depart from Terminal Los Heroes, located on La Alameda near the metro station Los Heroes.