As the railroad builders advance unstoppably through the Arizona desert on their way to the sea, Jill arrives in the small town of Flagstone with the intention of starting a new life.
You can now watch Once Upon a Time in the West online on the following streaming providers in the United States.
| Sound | Ennio Morricone | Conductor |
| Sound | Italo Cameracanna | Sound Effects |
| Production | Claudio Mancini | Production Manager |
| Costume & Make-Up | Alberto De Rossi | Makeup Supervisor |
| Production | Bino Cicogna | Executive Producer |
| Writing | Sergio Donati | Screenplay |
| Editing | Nino Baragli | Editor |
| Production | Fulvio Morsella | Producer |
| Writing | Dario Argento | Story |
| Sound | Roberto Arcangeli | Sound Effects |
| Writing | Sergio Leone | Story |
| Writing | Sergio Leone | Screenplay |
| Sound | Ennio Morricone | Original Music Composer |
| Writing | Bernardo Bertolucci | Story |
| Sound | Elio Pacella | Sound Engineer |
| Costume & Make-Up | Giannetto De Rossi | Makeup Artist |
| Crew | Eros Bacciucchi | Special Effects |
| Directing | Giancarlo Santi | First Assistant Director |
| Sound | Claudio Maielli | Sound Engineer |
| Costume & Make-Up | Carlo Simi | Costume Designer |
| Sound | Luciano Anzellotti | Sound Effects |
| Camera | Tonino Delli Colli | Director of Photography |
| Directing | Sergio Leone | Director |
| Crew | John Landis | Stunts |
| Costume & Make-Up | Grazia De Rossi | Hairdresser |
| Production | Ugo Tucci | Production Supervisor |
| Sound | Fausto Ancillai | Sound Engineer |
| Art | Carlo Simi | Production Design |
| Writing | Mickey Knox | Dialogue |
