Due to the severe weather forecast for London Heathrow tomorrow Aer Lingus has cancelled a number of flights to and from the UK.
Aer Lingus has said customers who are affected by the cancellations will be accommodated on the next available flights.
The airline asks people to visit its website in order to change their booking or request a refund.
It comes as Irish Ferries cancelled all Jonathan Swift fast craft sailings for today after Met Éireann issued a weather warning of strong to gale force winds gusting up to 90km/h.
Passengers can, however, avail of its Cruise Ferry sailings. All the company's fast craft sailings tomorrow are yet to be confirmed.
Irish Ferries has urged any intending passengers to check the status of their sailing in advance.
The Stena Line sailing from Rosslare to Fishguard at 9am this morning was cancelled as was the 2.30pm sailing.
The west and northwest of the country will be worst affected.
Meanwhile, Organisers of the Dublin City Marathon are reassuring participants that tomorrow's event will go ahead as planned.
Some of the marathon's marquees and stages may be curtailed as bad weather hampers preparations.
However, the event will proceed tomorrow with a record 14,500 athletes taking part.
Because of the bad weather and concerns for public safety, the Samhain event in Marlay Park in Dublin today has been cancelled.
Some 17,000 people were due to attend the event.
In Britain the Met Office issued a warning to millions of people in Wales and southern England to expect hurricane force winds overnight.
It said winds in excess of 130km/h could bring down trees and cause structural damage, leading to power cuts and transport disruption.
The Environment Agency in the UK warned of surface water flooding incidents across most of England as forecasters predicted 20-40mm of rain could fall within six to nine hours.
The storm will develop over the Atlantic and is expected to hit the southwest of Britain before moving northeastwards.
Heavy rain is due to arrive on Sunday night with strong winds in the early hours of Monday, the storm is expected to be out over the North Sea later tomorrow.
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