Is any airline other than Stobart even looking at starting flights from Carlisle? I can't imagine any would be.
Nor I. Obvious potential destinations would be Dublin, London and Amsterdam but Carlisle hasn't had a particularly good track record with any scheduled flights. London and Dublin would be routes for Stobart. I can't imagine KL being interested in AMS with an F70 and I'd imagine that Stobart would prefer to feed DUB hub.
Thinking out of the box a bit, I wonder whether Aberdeen might be a potential route for Eastern Airways with a J41? I'm not sure how viable it might be so maybe someone with a better local knowledge might like to comment?