Depending on your starting point, getting to the Serbian capital by plane might be the quickest option.
Belgrade’s Nikola Tesla Airport, the country’s busiest, is located some 18km west of the city center and is well connected to nearly every European capital. Belgrade also has a direct flight to New York’s JFK airport, seasonal charter flights to Greek islands during the summer, and a number of low cost airlines operating flights to and from Nikola Tesla Airport. The Serbian flag carrier is Air Serbia.
There are a couple of different ways to get from the airport to the city once you arrive, namely by bus (71 and A1) and taxi.