how planes fly?

Planes fly because of something called aerodynamic lift. This is when air passes over the wings of the plane, creating a difference in air pressure. The lower pressure causes the plane to rise into the air. To help you understand, think of a paper airplane. The same thing happens when you throw it in the air. The air passing over the wings causes it to lift up. Now, when an airplane is on the runway, its engines provide thrust. This thrust propels the plane forward and creates enough speed for the wings to generate lift. This is why planes need a long runway to take off. Fun Fact: The longest non-stop flight ever flown was from Singapore to Newark and lasted 18 hours and 45 minutes!