It represents our path in life and it may reflect some of our fear and anticipation. Planes symbolize part of your lifes journey. They represent things that are now far in the past such as events that you dealt with a long time ago, which you're now starting to forget. If you are a passenger in a plane you may be subconsciously thinking about someone or something that is far away and you wish to get in touch. The significance money has in your waking life is reflected in your dream state.
Money is a symbol of power and wealth.
We often judge ourselves based on our ability to make it, save it, and spend it. First consider your own relationship with money and your current financial situation as this dream could be simple wish-fulfillment. I sniffle all the time. A good day at uni. John informed me I have nice boobs.