- Released on August 20, 1971
- Running time: 86 minutes | 83 minutes (Spain)
- Production Co.: Central Cinema Company Film (CCC) | Fénix Cooperativa Cinematográfica | Cite S.L. (uncredited)
- Distribution Co.: Cinerama Filmgesellschaft MBH (1971) (West Germany) (theatrical) | Filmzentrum (1971) (Austria) (theatrical) | CEA Distribución (Spain) (theatrical)
- Directed by Jess Franco
- Written by Artur Brauner, Mickey Knox, Arne Elsholtz and Jess Franco
- Starring: Thomas Hunter, Gila von Weitershausen, Hans Hass Jr.
- A plane leaving the turmoil of a South American country in the midst of a revolution crash-lands in the Amazon jungle in Brazil. Among the passengers are a corrupt banker who is smuggling diamonds out of the country, a reporter, a mysterious beauty and a shady flight attendant. The survivors find themselves up against not only the dangers of the jungle itself but a band of headhunters and a gang of revolutionaries who are looking for the smuggled diamonds.
Also known as
- X 312 - Flug zur Hölle
- Vuelo al infierno
- Die Grüne Hölle des Amazonas
- Hölle, dein Sieg ist dir sicher
- Infierno, tuya es la victoria
- X 312 - Flight to Hell