Londonderry is in Northern Ireland; it is very close to the border with the Republic of Ireland. The name of the city originates from the Gaelic language, in which it has always been called "Doire" -...
From Sligo town to Ballaghdareen is about 30 miles or 49 kilometres.
Longest distance across Northern Ireland is 110miles, from outside Manger to outside Ballyhalbert.
Roughly 3,200 miles (from the US east-coast to the middle of NI).
1,950.43 kilometres (1,211.94 miles)