hey stoyan and emo,
thanks a lot for your answers (and sorry that I am only asking about Air Via
you know there is the website www.planeboys.de
(also available in english!) and they have a "forecast". there you can find the Air Via Flight 601/602 SOF-SXF-SOF beginning at the 17. of December until 25th of March. But unfortunatly this website is the only source so far, but it is made by some guys working at the airports of Berlin. So I am still hoping to see them again.
There is something else wich I would like to ask for. If you check out www.aerotransport.org
and you are searching for Air Via (you have to look for "via est vita") you will see that only LZ-MIG seems to be active right now. Unfortunatly I am an "non-subscriber" but something seems to happen to the other 4 aircrafts. You know, last winter there was also a weekly course between SOF and SXF via DUS and they used more or less only one airplane (LZ-MIS) so it might be even possible that they sold/retiered "K","L","R","S"? Any news about that?
thanks for your help!