To get to Dalcahue, one option is to take a flight to El Tepual airport in Puerto Montt and then take a bus to Ancud and finally another bus to Dalcahue.
Another option is to take a ferry from Puerto Montt to Chiloé and then drive or take a bus to Dalcahue.
There are also direct buses from Santiago to Dalcahue, which take approximately 15 hours.
See more about the history of Dalcahue - Isla de Chiloé
See also information on Puerto Montt.