Fourth 9/11 flight to become film
According to trade paper Variety, the new film about Flight 93 has a relatively modest budget of $15m (£8.9m) and will be shot with hand-held cameras.
A cast and release date for the film has yet to be determined, although Variety has suggested that it could feature at next year's Cannes Film Festival.
Another big-screen version of the events of 11 September is being made by film director Oliver Stone.
The film, starring Oscar-winner Nicolas Cage, will tell the story of two police officers trapped in the rubble of the World Trade Center in New York and is expected to be released next year.
Stone called it "an exploration of heroism in our country".
Paramount Pictures said in February that it had gained the rights to 102 Minutes, a book by US reporters about the interval between the impact of the first airliner and the collapse of the first tower.
Further television programmes about 11 September are also due to air in the US, including a two-part documentary on the National Geographic channel and an eight-part dramatisation on US network ABC.