Airfield pavement is a critical element of an airport's infrastructure, designed with high strength to withstand the heavy and repetitive loads of aircraft and environmental factors that can reduce its lifespan. Pavement Condition Index (PCI) is recommended by the American Society for Testing and Materials (ASTM D 5340–20) to assess pavement surface distress and determine the type of Maintenance and Rehabilitation (M&R) needed to extend pavement life. The Federal Aviation Administration (FAA) Advisory Circular (150/5380-6C, Guidelines and Procedures for Maintenance of Airport Pavements, 2014) and the International Civil Aviation Organization (ICAO)’s, (DOC. 9137-AN/898, Part 2 and Part 9, Airports Services Manual, 2002), emphasize the importance of maintaining airfield pavement for aviation safety. M&R requires huge funds and negatively impact on airside capacity, operations, and revenues. Decision-makers use Life Cycle Assessment (LCA) and Life Cycle Cost Analysis (LCCA) as tools to choose the best economic alternative by comparing the Net Present Values (NPV) of several alternatives. The study focuses on rehabilitating a single runway at Beirut Rafic Hariri International Airport (BRHIA) using the LCCA procedures and the AirCost software. It aims to identify the most cost-effective and sustainable approach to runway rehabilitation, considering factors such as construction costs, user costs, maintenance expenses, Daily Revenue Reduction (DRR), and service life. The findings provide valuable insights into optimizing pavement management practices at BRHIA for enhanced infrastructure sustainability and durability.