While Jedi can lift things weighing in several tons, leap extroadinary heights, and survive falls that would kill most people, they cannot fly. The reason for this is not because George Lucas did not want his characters to be too powerful, it’s because using the Force for flying requires a lot of energy and concentration. If a Jedi focuses too hard on flying, they will lose control and fall. It is very dangerous to do so while in combat.
One exception to this is when Jedi Master Plo Koon floats around in his carbon freeze chamber while trying to escape from Order 66. While this looks like he’s flying, it is actually better described as levitation rather than flight. Levitation captures the feeling of floating more accurately than flying does. This is why many people confuse this with Jedi flying.
Another example is when Princess-turned-General Leia floats through space during Star Wars Episode 8. While this does look somewhat like flying, it’s more accurately described as Force flight. Force flight is similar to levitation in that it allows a Jedi to move through space for a short period of time. However, this does require a great deal of energy and concentration to do.
There is also a scene in The Clone Wars where Jedi Master Yoda disarms Ventress and she levitates herself off the ground before crashing to the floor. Again, this is a case of levitation rather than flying. It takes a lot of energy to use the Force to do this and it leaves them open to attack while doing so.
