Air Serbia and Wizz Air have scheduled April 13 as a tentative date for the resumption of flights from Belgrade Nikola Tesla Airport, which has been closed for commercial operations since last week to stem the outbreak of the coronavirus Covid-19. Both airlines have begun selling tickets for flights commencing in three weeks’ time. Additional adjustments remain highly possible, pending on travel restrictions and traffic demand. Air Serbia is today operating rescue flights to Moscow and Doha for stranded passengers, while foreign carriers, among which are Montenegro Airlines, Aegean Airlines, Air France and LOT Polish Airlines, have also been deploying aircraft to Belgrade to repatriate their own citizens. Furthermore, the Serbian carrier is expected to operate a flight to the United States in the coming days.
Foreign airlines have tentatively scheduled their resumption of services to Belgrade. According to existing schedules, Turkish Airlines, which will suspend most operations as of this Friday, plans to return to the Serbian capital and other points across the world on April 17. Etihad Airways will resume daily flights to Serbia on April 30, Flydubai on May 22 with seven weekly flights, while, at this point, Qatar Airways plans to make a comeback on June 1, initially with four instead seven weekly services, increasing to ten weekly from July 1. Government officials have so far refused to speculate on when the airport may be opened, blaming incoming arrivals from Europe as the source for the spread of the virus in the country.
Airlines are facing an unprecedented challenge as the Covid-19 pandemic continues to cause widespread disruption to operations and business. With cash tight and demand plummeting, airlines may be looking to bring in whatever money they can, by scheduling flights which may not necessarily materialise and getting passengers to defer their travel for later on, even if they won’t officially recognise revenue until a traveller flies. With exception to Croatia and Bosnia and Herzegovina, airports in other markets across the former Yugoslavia have been closed for commercial flights. Slovenia has tentatively scheduled the reopening of Ljubljana Airport for March 30, although it remains to be seen if it will reopen as new virus cases in the country continue to rise.
UPDATE: Wizz Air has since extended its service suspension from Belgrade until May 1.
UPDATE: Wizz Air has since extended its service suspension from Belgrade until May 1.

Comments
Most probably things would be worse both in Europe and in the rest of the world.
The decision to close and when to reopen is taken by the government of each country.
У Београду. Са вером да ће Ниш и Краљево почети летњу сезону. Очигледно да се огромни напори улажу да се савлада пандемија... Дивно. Отвара се пут за Београд.
Из Сиднеја,
Rodney. ✈
"Government officials have so far refused to speculate on when the airport may be opened"
But I'm inclined to think airlines may have been told something.
I am in Hungary now, but my dad is in Serbia, and I cannot enter into Serbia, but I have dual citizenship...Btw, I have flown many times with AS. This year it was that we are going to visit Dubrovnik, I have nearly booked our tickets, but fortunately, I didn't do that....
All employees will be sent to short-time work. (irrelevant to your question but preventive answer as to avoid speculations that people are being let go or asked to take unpaid leave or other similar disinformation)
Btw, before that you could stay at your own home for 14 days, not? In Hungary there is no isolation camps, just if you arrive from Italy, Spain, Chine, Korea you should self-isolate yourself..In Serbia there is more strict rules...I wish I could go back to home without being forced to camp :(
http://rs.n1info.com/Vesti/a579641/Otvoren-kamp-za-500-ljudi-u-Moravicu.html
And it would be madness to start such a project now.
For Hungary, additional issue for sure is they also have closed all borders, keeping even EU citizens from crossing through the country (BG, RO). Everything now goes on special permits, no matter is it in or out of country. Its complicated on multiple aspects...
I don't think that during this coming economic crisis offering cheap flights to travelers of the rest of the Balkans and Middle East (like it happened in 2013-2016) should be our top priority.
It means someone brings you to the Hungarian border by car, you walk through it and from Serbian side somenone wit the car needs to wait for you.
Of course you need to be isolated for 14 days in Serbia after it.
Trying to diminish its risks?
I suppose you should give all these scientists and doctors a lesson.
I am so sad to hear that.. Where have you been stucked? So it means that you have to apply for special entry visa or similar staff to enter into Serbia? And then your are forced to tent camps? hahaha
Trying to diminish its risks?
Could you please point where I wrote what you're accusing me of?
It doesn't sound so promising to be transferred to a "military tent camp"..Why? It would be enough to spend that period in your own house in self-isolation mode with a few COVID quick test. Not? It would be humane....Romanians do that also...