Are there 24-hour exchange offices in Belgrade? We arrive at night.
There are automatic currency exchange machines at the airport, located in the arrival hall, from where you exit to the street. They are definitely open 24/7.
a bit by taxi to the airport. In the city, currency exchanges open at 8-9.
For a taxi, you can pay 20-25 euros in euros. In the morning in the city, you will change for 117.