Solo travel is widespread, with 50% of U.S. travelers planning solo trips in 2025. Gen Z, Millennials, and Baby Boomers are leading the trend, driven by flexibility, personal growth, and digital nomad culture. United Airlines is responding with new routes like Houston to Medellín, Colombia, and AI-powered trip planning tools, making solo adventures more accessible. This shift marks a significant change in how Americans explore the world independently.