Studies on happiness determinants have mainly focused on individual characteristics, but recently, the focus was extended to public services. Regarding the role of transportation services, however, few discussions exist on the overall happiness beyond the transitory happiness from a single trip, which differs by the mechanical characteristics of the transportation means, and particularly, those in non-Western areas are very few. This study analyses the perceived transportation services-happiness relationship using a social survey of 46 thousand citizens in Seoul, South Korea. How transportation services contribute to happiness is discussed in relation to the auxiliary travel utility through activities/ non-activities on the way to the destination and to the intrinsic utility, which is generated by satisfying mobility instincts, in addition to the derived utility by those activities that are conducted at the destination, the traditional focus in the transportation literature. An analytical model based on partial least squares structural equation modeling estimates the relationship between happiness and the factor of perceived transportation services while controlling for seven factors. Analytical findings are that except for gender, the significance and magnitude of each of the indicators are comparable to those reported in previous studies and as expected, perceived transportation services significantly encourage happiness. Specifically, satisfaction with 714 | GIM major determinants of happiness on life situation (sociodemographics), attitudes/intentions, behavior, environmental conditions, leisure amenities, and urban risks. The Seoul Survey is conducted every year, but the 2009 version uniquely asked about fitness and diet, both of which are known to affect happiness (Lee & Jung, 2013). Thus, this study used the 2009 data in particular. Data on research variables are available online: https://drive.google.com/open?id=1zjt6 Qait_yniJy tPWWF ztoVe sH4k-w0Gb. A figure for the structure of the relationships between respective factors and their indicator variables will be given later.The remainder of the paper is structured as follows. The next section will provide a review of the literature on the definition and measurement of happiness followed by its determinants including transportation services. Then, the paper will present research variables and their data for the empirical analysis. Analytical results will be separately given for indicator-factor relationships and factor-factor relationships. The paper will conclude with a discussion on research findings and their differences from those conducted on Western areas and the relative importance of transportation service indicators and its policy implications.