Travelling out from Dublin airport to UAE

I have a UK visit visa, I arrived last July at a UK airport. Now I would like to change my flight back to Asia next month by using Dublin airport on my way out. Do I need an Irish visa to use Dublin airport by going out?

UK/Ireland has agreement that those with UK visit short visa can travel through Ireland but its not clear for me about using airport for going out for travel to other country.

Best Answer

Both the United Kingdom and the Republic of Ireland have a common Immigration policy called the Common Travel Area.
This Answer goes into further details.

Although both countries may have different policies for Foreigners, in most cases where a British Visa or leave to enter exists, no Irish visa is needed and vice versa.

Leaving Ireland with a valid British leave to enter should cause no problem.

Check the Wikipedia article if your country is listed.