Top-seeded Nadal rolled to a 6-2, 6-2 defeat of France's Jeremy Chardy to a gain a spot in Sunday's final against unseeded Horacio Zeballos in Vina del Mar.
The Spanish superstar -- participating in his first ATP Tour event in seven months following a knee injury -- had little trouble with Chardy and now will seek to wrap up a victory in his first appearance since June.
Nadal will be seeking his 37th career clay-court title against world No. 73 Zeballos, who gained the title match with a 6-3, 7-6 (7-4) semifinal victory over fellow Argentine Carlos Berlocq.
It marks his first finals appearance since the 2009 event in St. Petersburg, where he fell to Serhiy Stakhovsky.