Dreaming that you are flying is a sign of karmic relief. If you can't fly high, there is a cover on it, or you are being chased, it is karma that is holding you back, and you can't go straight into the sky.
When your karma is gradually lifted, you can get rid of the bondage and go straight up.
There are many ways to eliminate karma. The simplest thing is that when you are chased, you immediately recite Guanyin Bodhisattva, or Amitabha, or, er, Bamiya, and then the scene of chasing you disappears without a trace. Useful!
However, it is best to watch it often when you are fine. When danger comes, you will naturally blurt it out without thinking. It's more secure than cramming. Can you believe it?