Swiss are doing a repeat of their flash Business Class sale from London to Switzerland – Zurich and Geneva.
Book by 30 September 2015 and travel by 30 May 2016
Heathrow to Geneva – £191 round trip
London City to Geneva – £199 and to Zurich – £196 both round trip.
There is reasonable availability even in the period pre-Christmas when central Europe is full of Christmas Markets. When I looked, most of the cheaper flights are around mid-day and typically from London City.