The paper deals with the practical implementation of the sustainability principles on the example of the city destination of Prague using the city destination of Vienna as a benchmark. The aim of the paper is to evaluate and compare sustainability management measures taken to limit and eliminate the negative phenomena of international tourism in Prague compared to Vienna. The attention is turn to evaluating of the quantitative development of international tourism in Prague, its impact on the residents and the adopted sustainability strategy, monitoring and evaluation and residents´ involvement in the tourism management, planning and development. The multiple case study method including the quantitative and qualitative analysis is applied using the publicly accessible quantitative data and relevant documents. Basic quantitative indicators defining the tourism demand (number of international arrivals) and supply (bed capacity in collective accommodation facilities and selected collaborative platforms) and quantitative data on the number of residents in selected Prague districts are used to characterize mid-term impact of tourism on residential community. Two topics were chosen for comparison, namely sustainability strategy, management, monitoring and evaluation and second, residents´ involvement in the tourism planning and development. Since the international tourism market has undergone significant changes, the approach of private as well as public sectors to sustainability management changed towards to “the new normal” as mentioned in strategic documents and research studies published by the UN World Tourism Organisation and World Travel (UNWTO, 2021) and Tourism Council (WTTC 2021a, 2021b). Although Prague shows a higher tourist load compared to Vienna, its strategy, international tourism management and activities lack systematic approach incl. networking to other partners and their sustainability concepts, basic KPIs for sustainability measurement, basic data describing the tourism development and the communication towards local residents.