 By 1929, the airline flew regular flights connecting Budapest with Belgrade and Vienna.The main fleet before 1939 were eight triple-engined German-built Junkers Ju52/3m aircraft HA-JUA to HA-JUG, one airplane HA-DUR for the government, delivered between 1933–39.Five somewhat comparable triple-engined Italian-built Savoia Marchetti S.M.75 aircraft HA-SMA to HA-SME, delivered in 1938–39.