Most Similar Movies to One Flew Over the Cuckoo's Nest (1975)
If you are looking for movies like One Flew Over the Cuckoo's Nest (1975), you might like movies tagged with keyword : psychological thriller, rebellion, power struggle, black comedy, social commentary, human nature exploration, mental illness, antihero, group psychology, novel adaptation, social outcasts, mind control, human spirit, existentialism, mental institution, free will, anti-establishment, academy award winner, jack nicholson .
Fight Club (1999), Veronika Decides to Die (2009), The Hospital (1971), The Snake Pit (1948), Going Places (1974), Simple Men (1992), Something for Everyone (1970) ... Let's take a look at the following list...

Fight Club (1999)
An insomniac office worker and a devil-may-care soapmaker form an underground fight club that evolves into something much, much more.
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Veronika Decides to Die (2009)
After a frantic suicide attempt, Veronika awakens inside a mysterious mental asylum. Under the supervision of an unorthodox psychiatrist who specializes in controversial treatment, Veronika learns that she has only weeks to live.
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The Hospital (1971)
The suicidal chief surgeon (George C. Scott) of a New York hospital beds the daughter (Diana Rigg) of a mad patient (Barnard Hughes).
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The Snake Pit (1948)
A detailed chronicle of a woman during her stay in a mental institution.
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Going Places (1974)
Two whimsical, aimless thugs harass and assault women, steal, murder, and alternately charm, fight, or sprint their way out of trouble. They take whatever the bourgeois characters value: whether it's cars, peace of mind, or daughters. Marie-Ange, a jaded, passive hairdresser, joins them as lover, cook, and mother confessor. She's on her own search for seemingly unatta...Read all
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Simple Men (1992)
Bitter about being double-crossed by the women he loved, (and with the police after him to boot), Bill vows to seduce the next woman he sees, then throw her away. His brother Dennis, meanwhile, is equally determined to track down their long lost father, a revolutionary who has been in hiding for 20 years. For different reasons, both leave New York and head for Long Is...Read all
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Something for Everyone (1970)
In post-war Austria, young, handsome country lad, Konrad Ludwig (Michael York), charms his way into a butler position at the castle of the widowed (and destitute) countess von Ornstein (Angela Lansbury). Soon, the young man's running the entire household - and the bedrooms, as well. As he starts affairs with the countess' son, Helmuth (Anthony Higgins), and Anneliese ...Read all
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Wise Blood (1979)
Fresh out of the army, Hazel Motes attempts to open the first Church Without Christ in the small town of Taulkinham.
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Neo Ned (2005)
Like most kids, Ned idolized his father and dreamed of following in his footsteps. Unfortunately, his father was a two-bit crook who spent most of his life in jail. Without a family of his own, Ned falls in with the Aryan Brotherhood. Soon after, Ned is placed in a mental hospital where he is mesmerized by a young black girl who believes Adolf Hitler was reincarnated ...Read all
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Twin Town (1997)
Julian and Jeremy, two brothers prefer to spend their time on drugs and joyriding. When their father, Fatty Lewis, they show up demanding compensation.
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Suicide Club (2010)
Five complete strangers meet on a roof at sunrise to jump to their deaths, but a strange connection of incidents makes them postpone the event.
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Barefoot (2014)
The "black sheep" son of a wealthy family meets a young psychiatric patient who's been raised in isolation her entire life. He then takes the naive young woman home for his brother's wedding.
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Factotum (2005)
This drama centers on Hank Chinaski, the fictional alter-ego of "Factotum" author Charles Bukowski, who wanders around Los Angeles, CA trying to live off jobs which don't interfere with his primary interest, which is writing. Along the way, he fends off the distractions offered by women, drinking and gambling.
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Choke (2008)
A sex-addicted con-man pays for his mother's hospital bills by playing on the sympathies of those who rescue him from choking to death.
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Assassination of a High School President (2008)
At a Catholic high school, a sophomore newspaper reporter investigates a case of stolen SAT exams. He thinks he's nailed the suspect and managed to get the popular girl when he realises a larger conspiracy is afoot.
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The Million Dollar Hotel (2000)
Tragi-comic, romantic whodunnit set in a run down hotel which plays host to mentally ill people too poor to afford medical insurance.
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Fists in the Pocket (1965)
Augusto (Marino Mase) is the oldest son in a dysfunctional Italian family that includes a blind mother (Liliana Gerace), a selfish sister, Giulia (Paola Pitagora), and two epileptic brothers, Alessandro (Lou Castel) and Leone (Pier Luigi Troglio). Augusto is planning to marry Lucia (Jennie MacNeil) despite Giulia's repeated attempts to drive them apart, but cannot do so while taking care of the clan. An angry and unstable Alessandro decides to help Augusto by killing their mother and siblings.
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Dogs Don't Wear Pants (2019)
After a tragic event, Juha develops an unexpected but powerful connection with a dominatrix named Mona. His dangerous addiction to suffocation will lead them both down a wild, freaky path toward emotional enlightenment.
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