80
I don't know where either of those places are, but if you mean Ireland and North Atlantic Ocean, zero. Ireland is an island in the North Atlantic Ocean.
At its closest point it is only about 20 miles as the crow flies.
Ireland is an island, so the sea surrounds it, so it cannot be any closer to the sea. It is zero miles from the sea for example.
Lots of parts of Ireland are more than 20 miles from the sea. Nowhere would be more than about 80 or 90 miles from the sea. The conclusions that can be drawn is that Ireland is not very large compared to some countries.
The air distance from Elizabeth, New Jersey, United States of America, to Cork, Ireland, United Kingdom, is 3,128 miles. That equals 5,034 kilometers or 2,718 sea miles.
About 133 miles.
Depends where in Ireland !
About 75 miles or 120 kilometres.
About 108 miles or 174 kilometres.
About 147 miles or 237 kilometres.
About 131 miles, which is about 211 kilometres.
About 94 miles or 152 kilometres.