Tres Arroyos Airport — Tres Arroyos, Argentina

OYO is the IATA code for Tres Arroyos Airport, a modest regional airfield serving Tres Arroyos, a mid-sized agricultural city in the Buenos Aires province of Argentina. The airport primarily supports general aviation, agricultural spraying operations, and occasional charter flights connected to the surrounding farmland, which is heavily devoted to grain and livestock production. Tres Arroyos itself is known as a hub for Danish immigrant heritage in Argentina, and the airport reflects the town's rural, working character rather than any tourist draw. Facilities are basic, with a single runway suited to light aircraft, and scheduled commercial service is limited or nonexistent. Most traffic through OYO consists of small propeller planes tied to farming, flight training, or private travel between provincial towns.