This study investigates the role of Key Performance Indicators (KPIs) in enhancing performance appraisal systems in the airline industry, focusing on the strategic alignment of appraisal systems with organizational objectives, the customization of KPIs to diverse organizational roles, and the integration of technology for real-time feedback. Employing a mixed-methods research approach, the study combines quantitative data from surveys and performance records with qualitative insights from interviews and case studies across various airlines. The findings reveal that KPI-driven performance appraisals significantly contribute to operational excellence, employee engagement, and strategic alignment within airlines. Specifically, the strategic alignment of KPIs with organizational goals was found to clarify performance expectations and establish a transparent evaluation process, while the customization of KPIs to specific roles and the use of advanced HR technologies facilitated more dynamic and responsive appraisal processes. Additionally, the study highlights the importance of a development-oriented approach to performance management, suggesting that appraisals focused on identifying development opportunities can enhance employee motivation and organizational commitment. These insights offer valuable implications for airline HR departments seeking to optimize their performance appraisal systems and underscore the need for continuous innovation in performance management practices to meet the evolving needs of the industry and its workforce.