Tourism contributes significantly to climate change. However, it has continuously been excluded from national emission frameworks globally. Climate action must play a leading role in national tourism plans by measuring, monitoring and reporting tourism emissions for sustainable destination management. The purpose of this study is to identify the most applicable approach to measure the carbon footprint of tourism internationally. This study conducted a comparative analysis of the international approaches and toolkits available to measure tourism emissions. Consequently, contributes new knowledge to tourism policymakers by outlining the advantages, limitations and barriers of utilizing each approach. The findings identified that the most favorable approaches cannot be used internationally due to tourism data limitations. Thus, barriers to establishing and maintaining a standardized measurement and system to accurately monitor the level of tourism decarbonization worldwide are created. Nevertheless, tourism policymakers can begin to minimize these barriers by collecting credible data to establish the Tourism Satellite Accounts. Climate change is a significant crisis facing humanity, and until now, this research has not been completed.