Porto Nacional Airport — Porto Nacional, Brazil

Porto Nacional Airport (PNB) serves the historic riverside town of Porto Nacional in Tocantins state, Brazil, one of the oldest settlements in the region and once a colonial trading post on the Tocantins River. The medium airport primarily handles small regional aircraft, light charter flights, and occasional agricultural or government service traffic rather than scheduled commercial jets. Its runway and modest terminal reflect the low-density air traffic typical of Brazil's interior states, where road travel over long distances makes small airfields like PNB valuable for connecting isolated communities. PNB supports regional development, medical evacuation flights, and access to nearby Palmas, the state capital, for travelers who cannot use larger hub airports directly.