He amassed a total of 168 appearances and scored 68 goals for the side in the nation's top two leagues combined over the course of eight seasons.
In the summer of 1992, following the breakup of Yugoslavia, Lončar moved to Greece and signed with Aris Thessaloniki.
He spent the next four years with the club, making 99 appearances and scoring 35 goals in the top flight of Greek football.
Between 1984 and 1985, Lončar represented Yugoslavia during the 1986 UEFA European Under-18 Championship qualifying, making two appearances as a substitute.
[1] Between 2012 and 2013, Lončar served as sporting director for OFK Beograd, before becoming assistant manager to Zoran Milinković at Aris Thessaloniki.