In March, Serbia signed an agreement that will allow Europe's biggest construction and concession firm Vinci to operate the airport over the next 25 years.

Under the deal, Vinci had to pay 501 million euros ($616 million) for the concession and invest another 732 million euros in the airport, the biggest in the Balkan country.

Airport Nikola Tesla's revenues in the third quarter stood at 3.29 billion dinars, on 1.59 billion dinars in expenditures, it said.

In the first nine months of 2018, the airport made a net profit of 2.77 billion dinars, up 3.1 percent on the same period a year ago.

The company said earlier this month that it carried 4.401 million passengers between January and September, a 6 percent rise on the year.

Airport Nikola Tesla's shares, traded on Belgrade's Belex stock exchange, stood at 1,677 dinars on Wednesday, unchanged from the day before.

(1 euro = 118.4462 Serbian dinars)

($1 = 103.6300 Serbian dinars)

(Reporting by Aleksandar Vasovic; Editing by Kirsten Donovan)