Before the Kosovo crsis JAT Yugoslav Airlines had 44 destinations in Europe, China and tge Mediterranean. Now it flies to Moscow, Larnaca, Beijing, Skopje and I think that is it. Had the Kosovo crissis not broken out they would have started flights to North America by the end of '99. They were also supposed to recieve 8 new A319's to replace some of their 727's and DC-9's.
As far as foerign airlines go, British Airways, Lufthansa, Air France, Alitalia, Aroflot, Swissair, CSA, Olympic, etc. flew to Belgrade before the Kosovo crisis. Now only Aeroflot flies to Belgarde along side Montenegro Airlines. After the crisis ended the EU wanted to lift the air embargo but the US vetoed that decision.
Before the former Yugoslavia broke up JAT at one point had transported 9.3million passengers a year, the amount Aeroflot transports today.