If anyone could manage to produce a jungle action/adventure for the price of a sangria, it would be Jess Franco. Even by 1971, he had carved out a name for himself as being able to make a virtue out of a microscopic budget. However, some films lend themselves better to that arrangement than others. For the dream-like 'horror' films he directed, such cut-price weirdness can actually enhance the overall mood - with a film such as this, where the dangers are more real, the constraints are more obvious.
'Flight to Hell' features prolific Spanish actress Esperanza Roy (as Anna Maria), who shows off a lot more than she did in possibly her better known role of Vivian, the second most glamorous character in 1973's 'The Return of the Evil Dead' (someway behind ruggedly coiffured hero Tony Kendall). There are also a number of faces here that are familiar from other Jess Franco films, most notably Howard Vernon, Paul Müller and Ewa Strömberg. Fernando Sancho is also notable as the dastardly Paco.
'Flight to Hell' is a nicely structured, although not hugely exciting, Franco jungle romp, with various plane crash survivors trying to stay alive in the tropics, whilst keeping their heads amidst greed and squabbles.
There's a fairly sexual lesbian scene involving Anna Maria and Lolita (an uncredited Beni Cardoso), who is introduced purely for that brief moment. This only goes to enflame the passions of Vernon's Pedro (it's a testament to Vernon that his character is pretty convincing despite a very false-looking moustache. His presence lifts any film he is in, even when playing a fairly minor role: this is no exception).
All in all, this will probably suffer the fate of many of Franco's projects - those unfamiliar with his work will note with disdain the constant zooms, meandering plot and murky pacing. Others, who have a fondness for Uncle Jess (like myself) will find the whole venture charming in its way, with a lot to enjoy. Not a major work from the director, this nevertheless entertains for its 86 minutes. My score is 6 out of 10.