I am planning to take the Tur-Bus company day bus from Puerto Montt to Santiago leaving at 08:00 and arriving at 22:00. It is a 14 hour ride! Does somebody know if the bus make any stop breaks during the trip (e.g. lunch, toilets, etc.)
It'll probably stop over for lunch and maybe for dinner. And probably in some other cities to pick up more passengers. Don't worry, you'll be able to eat something and go to the bathroom.