Loganair keeps entering the discussion. One odd thing that happened with the SEN-MAN route a couple of weeks ago, apart from it going off sale beyond early Jan (which seems a strange time to pull such a route), is that the minimum price suddenly jumped to £90. It’s also not been included in the recent discount promotion.
Its operating now for between £90 and about £160 for the basic non-flexible handluggage only fare. So it’s not just a case of hiking prices to deter forward bookings. What’s interesting is that when Carlisle was on sale, £90 is the minimum fare Loganair were charging.