This study examines the environmental impact of tourist ridesharing from 2016 to 2022, focusing on short-distance trips to airports and tourist destinations. Using data from a Slovenian ridesharing provider, the research explores how shared mobility reduces vehicle kilometers traveled (VKT) and mitigates CO2 emissions. The dataset includes nearly 2 million passengers and 295,881 rides, analyzing occupancy rates, distances traveled, and saved kilometers. Results indicate that ridesharing saved 172 million kilometers traveled and avoided 15 million kg of CO2 emissions during the observed period, with an average CO2 reduction of 51 kg per trip. Findings highlight ridesharing's role in addressing environmental challenges in tourist transportation, particularly where public transit infrastructure is insufficient. Despite challenges like COVID-19's impact on demand, ridesharing's high occupancy rates demonstrate significant potential for fostering sustainable travel practices. The study advocates for further integration of ridesharing into regional transportation systems and policies to enhance environmental and economic benefits.