The papers presented in this work cover themes such as sustainable tourism; ICT and tourism; marine tourism; tourism and education; tourism, economics, and finance; tourism marketing; recreation and sport tourism; halal & sharia tourism; culture and indigenous tourism; destination management; tourism gastronomy; politic, social, and humanities in tourism; heritage tourism; medical & health tourism; film induced tourism; community based tourism; tourism planning and policy; meeting, incentive, convention, and exhibition; supply chain management; hospitality management; restaurant management and operation; safety and crisis management; corporate social responsibility (CSR); tourism geography; disruptive innovation in tourism; infrastructure and transportation in tourism development; urban and rural tourism planning and development; community resilience and social capital in tourism. The 4th ISOT 2020 aimed at (1) bringing together scientists, researchers, practitioners, professionals, and students in a scientific forum and (2) having discussions on theoretical and practical knowledge about current issues in tourism. The keynote speakers contributing to this conference are those with expertise in tourism, either in an academic or industrial context.