Lol guys you should do your reading. You never know when knowing about needing a towel might come in handy. Or knowing that to whatever you do DON'T PANIC
(Disclaimer:Although I do work for the FAA (as a radar, communications, and automation tech), my opinions are mine alone and do not represent the official position of the FAA) You take lessons, you log hours with an instructor, you take a test for your pilot's license. (I was tempted to just answer "Immediately" since you said we could answer immediately.)
Humans cannot physically fly. It is not mathematically possible. The weight of our bodies against the gravity of the earth does not allow it. With the help of machines we can use those to fly i.e. hang gliders, planes, parachutes, etc., but they all eventually force us back onto the ground.
By that logic, the only "flying" objects are those in orbit, or deep-space probes like Voyager 1 and Pioneer 10.
Those aren't technically flying then, they are orbitting. Technically to "fly" you need to have lift and you go through a form of fluid (air) the objects push through and into the fluid making them rise in it; Kinda like a piece of cork in water, we are rocks in water. So Those objects in space aren't going through any type of fluid. and there-for, not flying but being pulled around by gravity.
Flight is a temporary state. Your initial argument implies that if a body cannot stay permanently airborne, it isn't flying. Also, there IS matter in space, just precious little of it. Also, astronauts on space stations.
