The Shawshank Redemption

Red crossing the border and making it to Mexico is his final triumph over institutionalization and his redemption as a human being. The growing realization that Red is the one that gets redeemed, and not Andy, is pretty profound. Andy didn't need redemption. He had faith the entire time. Red needed to be saved, and Andy's faith saved him.

One Flew Over the Cuckoo's Nest

Chief killing McMurphy as a mercy and leaving the institution so he can begin living again is the same story as the above, just with different characters. Can you tell I like redemption stories?

Big Fish

The final realization that his father's stories all held a kernel of truth, and all the myriad characters were real utterly transforms the son in the final scene. He wasn't necessarily a liar, just someone who saw the romanticism of life and brought it out.