Dreams can be so romantically poetic. A lot of the time we are looking for deeper meaning and symbols. They can also alert us as to which dosha is at play. If you're really good at writing your dreams down when you wake, I suggest trying to describe them in terms of qualities.
I once had a series of dreams in a row where I was travelling village to village in the ice and snow. I realised it was the excessive moving I was doing that was causing a Vata disturbance through the qualities of cold.
Dr Lad tells us that to dream of flying just means you have too much gas.