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Food waste is responsible for a significant portion of solid waste generation in the international airports, where efficient on-site or off-site sorting and recycling may be feasible. The aim of this study is to develop a Life-Cycle Cost-Benefit Analysis (LC-CBA) framework, through the integration of the life-cycle assessment (LCA) and cost-benefit analysis (CBA), to guide decision-making in sustainable food waste management. The analysis tool assesses the environmental and economic performance of different food waste management options, as demonstrated in a case study of the Hong Kong International Airport with six food waste handling scenarios consisting of different combinations of treatment technologies. Both centralized (i.e., off-site) and on-site treatment options were evaluated. The on-site incineration scenario was found to be the most sustainable option with the lowest life-cycle net costs of HKD 461.73 …