When did the first passenger plane become a reality?

The first passenger plane became a reality on July 4, 1910, when the aviator Henri Farman carried a fare-paying passenger in his biplane during a flight in France. This marked a significant milestone in aviation history, as it was the first instance where individuals other than the pilot were transported by aircraft for a ticket price, demonstrating the potential for commercial air travel.

This event is pivotal because it indicated the transition from aviation being solely a military or experimental endeavor to a viable means of public transport. The concept of paying for a flight would set the foundation for the future of commercial aviation. Prior to this, other flight attempts and demonstrations had been made, but they did not involve carrying paying passengers or did not last long enough to establish a feasible commercial endeavor.

The other dates listed either represent important milestones in aviation, such as the Wright brothers' first powered flight in 1903 or subsequent developments that did not involve passenger transport, which is why they do not reflect the moment when passenger planes became a reality.