Antonio Nariño Airport — Chachagüí, Colombia

PSO, Antonio Nariño Airport, serves Pasto, the capital of Nariño Department in southwestern Colombia, though the airport itself is located in the nearby town of Chachagüí due to the mountainous terrain surrounding Pasto. Named after Colombian independence hero Antonio Nariño, PSO connects the region to Bogotá and other major Colombian cities, serving a population centered around agriculture and the colorful Black and White Carnival tradition. The airport's high-altitude Andean location and surrounding volcanic landscape, including nearby Galeras volcano, present operational challenges for pilots. PSO remains a vital transport link given the difficult road access through Colombia's southern mountain ranges.