NEWS FLASH
Low cost carrier Wizz Air will introduce a new service from Bratislava to Niš. The carrier has announced the opening of its base in the Slovak capital with the Niš route to begin on December 16, initially operating four times per week over the holiday period, reducing to three weekly from mid-January. Tickets are now available for purchase through the airline's website. Further flight details can be found here. Earlier this summer, the carrier scheduled the introduction of flights between Dortmund and Niš, commencing on January 5 next year. As a result, it will operate four destinations from the southeast Serbian city.

Comments
In May I went to Bratislava for the first time ever and was shocked how close both cities are.
Why don't you want increased connectivity for BEG and a cheaper way of going to Austria than flying to VIE?
What a strange comment.
Ryan is not as cheap from INI to VIE as people might think. Since they became an only option to VIE prices went up, on some days flying AS via BEG is as cheap. Buses from Nis to Vienna are not as cheap as from Belgrade or Novi Sad and travel time is longer, no train service will be there to Vienna untill god knows where, Sofia is not that close as an alternative so flying to Bratislava is a good option. There are direct buses from the airport (at least they were back in the days) and you will be in Vienna in about an hour. Wizz chose a competitive line, it does not seem so random to me.
I can promise you one thing as someone who flies this route once every 2 months and always has a ticket booked - at any given time is FR cheaper than JU.
I did fly with Lauda from INI to VIE for like 15e return, but booked like 5 months in advance. Diaspora rarely buys tickets that much in advance, thus paying more.
I would say, that this is not entirely VIE replacement but it openes also a new catchment area in Slovakia (Zilina, Trnava, ...).
Ryanair doesn't go lower than 9,99€ for one way since the start of pandemic! Don't lie! It's cheap anyways 😂
Malaga or Mallorca. It doesnt have to be by Wizzair. Ryanair would be welcome too.