Air passengers are facing a fourth day of cancellations and delays because of thick fog in the UK.
Dozens of flights travelling into and out of Ireland have been affected.
Due to foggy weather conditions in London there may be some flight delays.
Please check with your airline for up to date flight info— Dublin Airport (@DublinAirport) December 31, 2016
The conditions have now started to improve.
Anyone intending to fly this weekend is being advised to check out their airline's website before heading to the airport.
— Thames Valley News (@HeartThamesNews) December 31, 2016