The Role of ISO Standards in Integrating Sustainability into the Operations of the Tourism Industry

The tourism industry serves as a key driver of economic growth for many destinations, countries, and economies. However, it faces significant global issues such as climate change, environmental degradation, and the preservation of ecosystems and must strive to balance sustainability with continuing economic development. Many initiatives, such as the Sustainable Development Goals (SDGs), Environmental, Social, and Governance (ESG) criteria, and the Global Sustainable Tourism Council (GSTC) standards, have emerged to support and promote sustainability. ISO standards offer structured frameworks that guide organizations in organizing and managing specific business processes, and in recent years several standards have been introduced to address the unique challenges of the tourism sector. Despite a growing body of work on each of these frameworks individually, the literature has not yet articulated a coherent conceptual model that connects them, nor has it offered operationally specific guidance for small and medium-sized tourism enterprises seeking to adopt them. This article addresses that gap. Drawing on institutional theory and stakeholder theory and using a structured narrative review of academic literature and ISO documentation, the article (1) develops a three-layer conceptual model in which Total Quality Management functions as the philosophical foundation; ISO standards as the operational execution layer; and ESG, SDG, and GSTC frameworks as the output goals; (2) provides an in-depth mechanism analysis of ISO 14001 and ISO 21401 in accommodation settings; (3) maps selected ISO standards onto the three ESG pillars; and (4) proposes a phased implementation road map for small and medium-sized enterprises together with policy recommendations for destination management organizations. The article also engages critically with the risks of greenwashing and with concerns about the cultural transferability of Western-rooted standards to developing-country contexts.