Much prior research relies on the idea that antipathy towards immigrants is primarily driven by natives' perceptions of the threat that immigrants represent to their economic, cultural or national well-being. Yet little is known about whether subjective well-being affects attitudes toward immigrants. This study aimed to examine whether life satisfaction would foster tolerance towards immigrants over time via the indirect influence of political satisfaction and social trust. The sample comprised young native adults (N = 1352; M age = 22.72; SD = 3.1) in Sweden. The results revealed that young adults who were satisfied with important life domains were more likely to extend their satisfaction towards the political system, which consequently resulted in a generalised expectation of trustworthiness and a widening of their circles of trusted others. This then translates into more positive attitudes toward immigrants. The findings provide evidence that it is the causal relationship between political satisfaction and social trust (rather than social trust in itself) which promotes the positive impact of life satisfaction on tolerance towards immigrants. The study highlights that fostering political satisfaction and social trust may play an important role in shaping young people's positive attitudes towards immigrants.