In 1936, the Yugoslav flag carrier Aeroput used a seaplane station in Dubrovnik to open the first route to the national capital Belgrade via Sarajevo. The following year a route to Zagreb was inaugurated. However, the city was primarily served by an airfield at Gruda, approximately 5 kilometres (3.1 miles) south-east of the current airport, which opened for commercial traffic in 1936, initially only in use during the summer months. But it was in 1938 that Dubrovnik saw a significant increase in air traffic, with the introduction by Aeroput of regular flights to Vienna, Brno and Prague with stops in Sarajevo and Zagreb, and also the introduction of a regular flight between Belgrade and Tirana with a stop in Dubrovnik. By the early 1940s, due to World War II, Aeroput operations were suspended. After World War II, Gruda Airfield continued in operation until the current Dubrovnik Airport opened in 1962. During 1987, the busiest year in Yugoslav aviation, the airport handled 835,818 passengers on international flights and a further 586,742 on domestic services. Following the breakup of Yugoslavia, the airport surpassed the one-million-passenger mark in 2005. In September 2023, it surpassed the two-million-passenger mark. Today, Dubrovnik boasts the most modern passenger terminal in the country. A new terminal has been built in place of the old airport building, that dated from 1962, which has now been demolished to make way for a new modern structure. The price tag of the project amounts to seventy million euros and is to be financed out of a loan from the European Bank for Reconstruction and Development. In May 2010 a new terminal opened stretching over 13,700 square meters. Dubrovnik Airport has the capacity to handle two million passengers per year. In 2023 the airport was renamed to honor the astronomer and polymath Roger Joseph Boscovich (Ru?er Josip Boškovi?, 1711–1787). The rebranding of the company was done by the branding consultancy Filburg.