One phenomenon observed during the pandemic was increased staycation in most countries. This study focuses on wellness tourism through staycation in Malaysia and Singapore. A self-administered online questionnaire was completed by 109 Malaysians and 60 Singaporeans. Using IBM SPSS and SmartPLS, the determinants examined were the sense of presence, experience quality, hedonic motivation, and psychological detachment and mediated by family involvement towards the gratification of wellness tourism. This study contributes to theory and practices for Malaysia and Singapore's domestic tourism and the United Nations' Sustainable Development Goals 8 and 12 for mental well-being and responsible consumption.