FLINS and ISKE are two well-established international conferences, both launched by Da Ruan (1960-2011), that share a common objective: to link the theoretical foundations of computational intelligence with its applications to complex engineering and multidisciplinary decision making problems, by putting together research institutions and industries, covering all the fields related to uncertainty management, operational research and artificial intelligence, including observation and experimentation, information processing, unavoidable ethical considerations and future trends in artificial neural networks, classification, clustering, computing with words, decision-making, evolutionary/genetic algorithms, expert systems, feature extraction, fuzzy systems, geographic information systems, intelligent systems, machine learning, optimization, soft computing, and applications related to these topics as water, energy and environmental management, among others. FLINS is the acronym introduced in 1994 standing for Fuzzy Logic and Intelligent Technologies in Nuclear Science; and ISKE is the acronym for Intelligent Systems and Knowledge Engineering, launched in 2006. Every two years both conferences are organized jointly. This is the Proceedings of FLINS-ISKE 2024, held in Madrid (Spain), in July 16-21 2024.