This paper reviews the applications of Augmented Reality with an emphasis on aerospace manufacturing processes. A contextual overview of Lean Manufacturing, aerospace industry, Virtual Reality (VR) and Augmented Reality (AR) is provided. Many AR applications are provided to show that AR can be used in different fields of endeavor with different focuses. This paper shows two case studies in aerospace industries, presenting different forms of AR use in aerospace manufacturing processes to demonstrate the benefits and advantages that can be reached. It is concluded showing that gains of labor qualification, training costs reduction, inspection system and productivity of the business can be provided by the use of AR.