Depends if they had to wait for a tour operator to confirm a take up of some of the seats or if it's a big airport then slots and handling if they've never flown there say Nice as an example or Split.
With the Dash based i wouldn't rule out say Rennes. BRS has no flights to that area of France and they operate a weekly flight from EXT and there is the Celtic connection between Brittany and Wales so could be a possibility.