Out of the four flights only one went the way you would expect leaving an initial positive impression. Their old ATR was turbulent and loud without a proper space for your legs but the staff was otherwise nice for the short duration of the flight, just as it was for most of the experience with Air Serbia with the only complaint being the poor knowledge of English which applied not only to the AS staff but also to most of the personnel at their home airport in Belgrade.
From there on it only kept on going downhill, our connecting flight got delayed multiple times leaving us stuck at Belgrade for about 17 hours without proper food, water and shelter given the Nikola Tesla Airport offers very little past coffee, cakes and premium chocolate for sustenance.
Direct requests for information were immediately turned down by being told to wait for more information and watch the departures screen.
We departed two hours after the actual new departure time sitting at the gate without being given any reasons at all.
The third flight was delayed the same way, this time however we were stuck at the gate for the entire duration.
The fourth and the last time that I will ever fly with Air Serbia seemed to go great initially, we departed and arrived at the exact scheduled time, unfortunately it all changed once we realized our baggage has gone missing.
Contacting the Austrian lost & found we were told the baggage is still inexplicably in Belgrade. However assured by Austrian's excellent service it was to be delivered the moment it arrives back to Vienna.
Which it certainly did, early the next day.
To our disappointment the suitcase, despite being locked was broken into and the laptop together with its charger was gone. The toiletries were also thoroughly searched, probably in an effort to find jewelry people often hide inside which we had none fortunately.
They only went for the items with the highest resale value and left everything else intact.
We filled a claim report immediately, containing all the required documentation including the baggage tags, boarding passes, invoices, report from Austrian lost and found and everything else they asked for specifically. Not to our surprise, Air Serbia simply ignored any and all of our effort to hold them liable for the damage to this point.
Shall my experience serve as a warning for all of you who travel or consider traveling with this airline, respectively consider traveling through Nikola Tesla Airport in Belgrade, Serbia where the theft most likely took place.