John Travolta noticed a historical error in Quentin Tarantino's Once Upon a Time … In Hollywood

He's one of the most celebrated Hollywood directors of all time, known for his overly stylised films that have influenced the movie industry.

But Quentin Tarantino seems to have made a historical error in his latest blockbuster, Once Upon a Time … In Hollywood, starring Brad Pitt, Leonardo DiCaprio and Margot Robbie.

A-list actor John Travolta, who had his career invigorated by Tarantino in the cult 1994 classic Pulp Fiction, has pointed out Once Upon a Time featured a mistake that only a pilot would be able to pick up on, news.com.au reports.

Speaking at a Q&A about his latest film, The Fanatic, Travolta (a pilot himself), said the mistake happened during a plane scene featuring Rick Dalton (DiCaprio).

Director Quentin Tarantino, right, with Leonardo DiCaprio and Brad Pitt, left, during the filming of "Once Upon a Time in Hollywood." Photo / AP

"Leonardo (his character) is going home from Italy or wherever he was, and the narrator says that he took a 747," Travolta told an audience.

"Well, the 747 had its test flight in February 1969, but it went into service in January 1970. They're nine months off! He would have been on a Boeing 707!"

The film is indeed set in 1969 Los Angeles, around the time rising star actress Sharon Tate (Robbie) was murdered by members of the Manson Family, which happened in August that year.

Once Upon a Time was both a critical and box office success, as of last week grossing a worldwide total of $US372 million, against a budget of $US90 million.

Margot Robbie as Sharon Tait in Once Upon A Time In Hollywood directed by Quentin Tarantino. Photo / Supplied

Tarantino shocked diehard fans when he revealed in a July interview with GQ Australia that he was at the "end of the road" of his movie-making career after Once Upon a Time, which was his ninth film.

"I think when it comes to theatrical movies, I've come to the end of the road," he said. "I see myself writing books and starting to write theatre, so I'll still be creative. I just think I've given all I have to give to movies."

Pitt backed up Tarantino's claims the film would be his last.

"No, I don't think he's bluffing at all," Pitt said when he was asked about Tarantino's comments.

"I think he's dead serious. And I kind of openly lament that to him, but he understands the math of when he feels like directors start falling off their game. But he has other plans and we're not going to have to say goodbye for a long time," he teased.