Belgrade Airport handled 600,333 passengers in January, up 6.5% year-on-year, or 36,640 additional travellers.
The figure was achieved despite significant disruptions caused by fog and snow at the start of the month, which resulted in the cancellation of a number of flights.
The airport is on track for another month of passenger growth in February, with capacity projected to increase by 10.3%.
The airport saw a record 8.9 million passengers last year, up 6.5% annually.
Source: Ex-Yu Aviation, Momentum