This study examines the critical role of Key Performance Indicators (KPIs) in enhancing inventory accuracy, supplier reliability, and overall stock control efficiency within airline logistics operations. Employing a mixed-methods approach that integrates quantitative analysis of KPIs with qualitative insights from industry experts, the research identifies key metrics such as Inventory Turnover Ratio, Stock Accuracy Rate, and Supplier On-Time Delivery Rate as pivotal in optimizing stock control. Findings reveal that a KPI-driven strategy significantly improves operational efficiency, reduces inventory holding costs, and enhances supplier performance. A case study of a leading airline demonstrates practical applications of KPI-driven stock management, resulting in increased Inventory Turnover Ratio and improved Warehouse Utilization Rate. The study discusses strategic implications for airlines, highlighting the importance of KPIs in achieving cost savings, operational continuity, and supply chain resilience. Limitations are acknowledged, and recommendations for future research include exploring digital transformation's impact on KPI performance and integrating sustainability metrics into stock control practices.