Have just returned from flying STN-CGN on Germanwings. Flight was at 7.55am last Thursday & we arrived at the airport at 5.45am, check in was 5 mins, then Security queue was about the same!! Didn't mind the walk through the shops & then breakfast in the departure lounge & then went to the satellite which was quiet with plenty of seating. Return on Tuesday at 4pm in the afternoon, Border control about 30 mins wait . Flights on Germanwings about 90% full both ways. Overall a good experience at Stansted.
RE: Eurowings flights to Vienna. When you go through the booking it says "flight is provided by Austrian Airlines"