The heavy fog in London that caused havoc with airline schedules yesterday is expected to continue over the coming days.
There was major disruption to flights to and from England yesterday as the adverse conditions in England led to delays and cancellations of flights to and from Irish airports.
Heathrow airport was worst affected by the conditions as the thick fog and low visibility meant that air traffic control placed restrictions on how many flights could land and take off every hour.
Flights were subject to delays of up to 90 minutes at Gatwick, while Stansted and some regional airports in England were also affected.
The Met Office in England has warned that the dense and sometimes freezing fog will continue over the weekend. Passengers intending to travel in the next few days are advised to check with their airlines on the status of their flight before departing for the airport.
A spokeswoman for Dublin airport said that, by and large, the airport operated normally yesterday, with only slight delays of about 30 minutes on flights from Heathrow initially. Flights to some regional airports were delayed by 30 minutes to an hour, while flights in and out of Europe were unaffected.
However, the worsening conditions led to some cancellations and major delays throughout the day.
British Midlands reported "major delays" to their Dublin-Heathrow services. It cancelled two flights from Heathrow to Dublin and also cancelled one flight from Belfast and two from Dublin that were scheduled to fly to Heathrow. The rest of the scheduled flights from Dublin to Heathrow experienced delays of up to four hours.
A spokeswoman for Aer Lingus said its flights to London were running about four hours behind schedule, but that it was expected that everyone would reach their destination by last night. One flight and its return leg, EI172 and EI173, were diverted to Birmingham. Passengers were bused to and from London to Birmingham to accommodate the change.
Some Ryanair flights were also cancelled and in Dublin airport's departures lounge last evening a huge queue was forming outside the Ryanair ticket desk.
One man, Patrick Spears, was waiting in line with his friend because their scheduled flight to Stansted had been cancelled. "There was no indication of any delay," said Mr Spears. "It's difficult, because we've only had three hours' sleep."
Mr Spears and his friend, both architects who were in Dublin for a conference, were in luck, though, as they were soon offered one of 40 seats remaining on the 6.55pm flight to Gatwick.
Some British Airways flights along the Dublin-Gatwick route were cancelled, with the remaining flights experiencing delays of between one and two hours.
British Airways have cancelled all their domestic services to and from Heathrow again today.
Aer Arann flights to Cardiff, as well as British European flights to and from Southampton and Norwich, were also diverted or cancelled yesterday.