The cheapest day to depart on your flight to Belgrade is on a Sunday when prices can be found for as low as 227€. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Belgrade is Friday, with ticket prices averaging around 290€.
Finding an alternative and possibly cheaper destination airport near Belgrade is possible. If you are planning a flight to Belgrade, consider booking flights to Belgrade Batajnica Airport (21 km from Belgrade city centre) or Kraljevo Morava Airport (110 km from Belgrade city centre).