Finnair
Bookable from at least May 2016 but an odd schedule so it could be work in progress.
AY927/8 A319 09.10-09.50 Sunday, Monday & Thursday.
In days gone by, at first glance it might be described as a pseudo-IT aimed at inbound pax over the summer months to Edinburgh, similar to the current Edelweiss service but with the added bonus of it being a full-service operator. Although this could be year-round as this won't be known until it is officially announced.
I would imagine pretty useless for connections to their long-haul network to the Far East as it needs to be double daily, although I assume one -way (inbound) could be done with BA via LHR and of course there are also other alternatives.
I also checked the winter easyjet schedule out and Vienna is bookable twice a week from February but I originally chose a week in January to preview and couldn't believe the lack of flights but once February half-term kicks in the schedule is pretty good.
Pete