This study examines the Six-Day War from an asymmetric airpower perspective. There are two main problems which motivates the study. One is the asymmetry between Israel and the Arab nations. The other is a research problem, that prior studies fail to offer a full understanding of the use of air power in the war. The research question is: How can we understand Israel's success in the Six-Day War using The Underdog's Model? The main purpose is to provide a better understanding of the case which is being studied, the Six-Day War, and what role air power played during the war from a perspective of asymmetry in conflicts. Questions based on the different factors from the theory are used to analyse the literature. The results show that for some specific factors from the theory, it is hard to say exactly which side performed better. However, when analysed as a whole, the results indicate that Israel performed better than the Arab nations in general across the six domains. The results also indicates that Israel managed to reach several of their goals and denied their opponents from doing so in an efficient manner.