Why does it seem that the plane is not moving in the air?

Answer 1

A plane flies forwards by exerting a force on the air with its wings. the air pushes back on those wings with an equal force that propels the bird forwards

Answer 2

The farther away the slower it looks. it looks much smaller than it actually is therefore: even traveling at 600 mi. p/hr the air space is so vast that it causes an optical illusion.

When you're on a plane, it feels like it's not moving because, except for at takeoff and landing, the plane tends to fly at a constant speed - and you are moving with it at the same speed. You don't sense the plane's motion because you don't sense it accelerating or slowing down.

Answer 3

The sensation of stillness in a plane in flight is a result of your lack of external reference points moving past you at a noticeable rate. The plane is moving at a high speed relative to the ground, but the lack of close objects or motion outside the windows can create the illusion of stillness.