The ability to travel plays an important role in many Americans' daily lives, and the reduced ability to travel due to aging, chronic health conditions and disabilities will negatively impact their everyday activities, including work, independent living, community involvement, recreation, and subsequently, individuals' well-being across their lifespan. My current research in the travel behavior of people with disabilities and older adults is framed in the biopsychosocial model of functioning, disability and health, as defined by the World Health Organization. This conceptualization not only emphasizes the health conditions of individuals with disabilities from a biomedical perspective, but also embraces the social and environmental life domains of the individuals. My research focuses on the psychological, social and environmental factors that predict participation of people with disabilities and older adults in travel-related activities. Additionally, my research examines the consequences of participation in travel, namely, health-related quality of life. Findings from my research can be implemented in the travel and hospitality industries to help travel businesses (lodging, airport, destinations, etc.) expand their capacities to accommodate the ever-growing aging population.