Osijek Airport — Osijek(Klisa), Croatia

Osijek Airport (OSI), located at Klisa near Osijek in eastern Croatia's Slavonia region, serves as a regional gateway for a part of the country that sees far less air traffic than the Adriatic coast. The airport has historically offered limited scheduled service, often subsidized or seasonal, connecting Osijek to hubs like Zagreb or occasional European destinations, alongside general aviation and charter activity. Osijek itself is Croatia's fourth-largest city and a cultural center for the Slavonian plains, and OSI provides an alternative to long road or rail journeys from inland Croatia. The airport's relatively low passenger volumes reflect the broader pattern of Croatian aviation being concentrated around coastal tourism rather than inland cities.