"WHO" was the first person to fly.

The first person to fly was a French doctor named Pilâtre de Rozier. In 1783 he flew in a balloon.
The first person to fly an airplane were Wright brothers. Wilbur and Orville Wright flew their plane(The Flyer 1) in Carolina in 1903. It was a single seator plane. They tried four times and then the plane was accurately flying.

Photo from: https://upload.wikimedia.org/wikipedia/commons/9/9d/Early_flight_02562u_(4).jpg

https://www.loc.gov/rr/news/topics/images/wright.jpg