Flight 175: As the World Watched is an American television documentary film. It covers the final moments of the passengers and crew on board United Airlines Flight 175, which was the second commercial airliner to strike the World Trade Center, impacting with the South Tower during the September 11 attacks.

The documentary features interviews with a variety of people, including:

• relatives of the passengers and crew members, some of whom received final phone calls from their loved ones,
• air traffic controllers who responded to the doomed flight, and
• the two F-15 fighter pilots scrambled from Otis Air National Guard Base who flew in the airspace over Lower Manhattan during the event.