Split Saint Jerome Airport (Croatian: Zračna luka Sveti Jeronim Split; IATA: SPU, ICAO: LDSP), also known as Split Airport (Croatian: Zračna luka Split), is the international airport serving the city of Split, Croatia. It is located 19 km (12 mi) from Split, on the west side of Kaštela Bay, in the town of Kaštela, and extending into the adjacent town of Trogir. It is named after Saint Jerome, the patron saint of Split-Dalmatia County.

In 2019, the airport was the second busiest in Croatia after Zagreb Airport, handling 3.3 million passengers. The airport was the busiest in Croatia in 2021 handling 1.57 million passengers, surpassing Zagreb Airport for the first time. It is a major destination for leisure flights during the European summer holiday season and an important seasonal base for Croatia Airlines that offers flights to European cities such as Athens, Frankfurt, London and Paris.