Definitely. The movie United 93 recreates the actual circumstances of that fateful flight. It aims to tell the story as accurately as possible to honor the passengers and crew.
The significance of 'United 93' is that it commemorates the real - life heroism. It shows the passengers' brave fight against the hijackers on that fateful flight. It's a reminder of the events of 9/11 and the ordinary people who became heroes in an extraordinary situation.