SkyEurope, the low cost company with headquarters in Vienna, offers us an interesting offer:
Until January 13, all flights booked will be exempt from fees and charges. That is, the starting price will prevail without additional charges. Flights must be made between January 8 and February 29.
I've been doing some checks and, as long as the prices are not inflated at the outset, it's correct. Barcelona to Vienna for 60 euros is easy to find. However, the other combinations from Barcelona seem to be quite requested or there are few connections.
SkyEurope flies from Barcelona to Vienna, Bratislava, Buscarest, Insbruck, and Kosice. It also offers direct flights from Lisbon to Vienna, Krakow, Prague, Warsaw, Insbruck and Timisoara.
At the same time, it offers an interesting network of connections through Europe from Austria, especially to the eastern countries with arrivals in Budapest, Krakow, Warsaw, Athens, Amsterdam and Copenhagen among other destinations.
Official site, SkyEurope