Interesting what was discussed on RTE Radio 1, they siad the reason for this scale of traffic through Dublin was the sheer range of destinations that were not available from Belfast, but were from Dublin. They also commented that quite a volume of the passengers from the North were flying Dublin/Heathrow.
However, what would be useful to know how does this compare to previous years? Reason being that the amount of people in Ulster who live equidistant from Dublin and Belfast airports, e.g. Donegal, Fermanagh, Armagh, South Down etc. Dublin is equally suitable alternative.
EI -BUD