Yes Aer Lingus have tried CPH to death including a via Manchester option in the past if memory serves me correctly. However, if the demand is greater for DUB originating passengers there is no reason why Aer Lingus cannot get a fair slice of the market. Though I must admit to do so will make it quite marginal. When do the second pair of 319s join the fleet? Perhaps using a 319 may make it that bit more sustainable? Based on the fact that EI havent issued a Belfast winter timetable, and no sign of European routes, and still no sign of clarity of Belfast base for winter, a 319 or 2 may be appearing in Dublin sooner rather than later. a 144 seater could open up a range of routes from the Dublin market that Aer Lingus is not currently involved in.
EI-BUD