The Dublin Airport Authority says flight schedules at Dublin Airport have returned to normal following two days of disruptions caused by the cold snap.
Further snow is likely to fall over the weekend with widespread severe frost forecast tonight.
Live flight information: Aertel p570
For Arrival/Departure information on your mobile phone - go to Aertel p570 at mobile.rteaertel.ie
However, some early morning flights at Dublin Airport experienced delays.
The early morning Aer Lingus flight from New York to Shannon has been cancelled.
As temperatures drop again this evening, AA Roadwatch has advised that drivers should take extra care, particularly on secondary roads and in sheltered areas, where ice conditions continue to exist.
Gardaí say that many roads are unpassable in Co Donegal, with conditions described as treacherous.
Main routes in Offaly, Westmeath, Roscommon, Sligo, Leitrim, Waterford, Wexford, Wicklow are also very frosty or icy.
Secondary and rural routes in most areas of the country are very poor.
