Dream experts say dreams of airplane crashes have several different meanings. They could represent overly high and unrealistic goals you've set for yourself, feelings of being overwhelmed or out of control, or a fear of failing in a private or personal project or in life in general.
A dream about two or more planes crashing suggests that your path or goals are going to clash with someone else's.
A dream about a plane that nearly crashes means that you have the power to avert a possible tragedy in your life.
Of interest, a team of researchers in Japan is reporting that they figured out how to determine what thoughts are going through a person’s mind while they sleep. Participants of a dream study had their brainwaves recorded while sleeping and it was discovered that changes in activity were related to the content of their dreams.