The dominant movement of people in the mega-deltas of Asia is from agriculture-dominated rural areas to urban settlements, driven by growing opportunities, but resulting in new human development challenges. In this context, the present study aims to investigate whether remittance income leads to enhanced multiple dimensions of well-being in sending areas in tropical deltas, by focusing on two delta regions with significant out-migration rates, BangladeshiGanges Brahmaputra and the Vietnamese Mekong deltas. To this end, the paper offers an original conceptual framework, drawing on existing migration theories and the aspirations and capabilities theoretical framework (Haas et al. 2011). Data from large scale sample household surveys (2010 Bangladesh Household Income and Expenditure Survey and 2012 Vietnam LivingStandards Survey) are analysed through multilevel regression modelling to examine well-being outcomes in sending areas and links to remittance income. The results show that the temporal extent of internal and international migration is positively associated with remittances in both delta regions. The results also suggest that in both delta regions remittances have a significant positive effect on household well-being in the source rural areas, including overall income, investments in health, food security and access to sanitation. The study concludes that landscapes of urban and rural deltas are increasingly economically integrated which suggests greater resilience even for environmentally-at-risk tropical deltas.