Ryanair has confirmed that all Irish customers who saw their UK flights cancelled will be offered a refund.
The budget airline will contact passengers who were unable to get their flights between December 20 and January 3.
They will be offered the chance to reschedule or to avail of a full refund.
It was also confirmed that a small number of flights will operate to and from the UK before January 3 to allow UK residents to return home.
A Ryanair spokesman said: "Ryanair is processing cancellations for all flights to/from the UK between Dec 20th/Jan 3rd that have been banned by EU Govts regulation.
"All affected customers will receive an email notification and they will be offered practical alternatives including a free move or refund if they so wish.
"A small number of flights will operate to/from the UK from Dec 23rd to Jan 3rd primarily to facilitate UK passengers stranded abroad and to support passengers who need to travel for essential reasons.
"For passengers (booked on these operating flights) who do not wish to travel prior to Jan 3rd, Ryanair will facilitate a flight change, where no change fee will apply (any difference in fare will be charged), to any new date up to March 15th 2021.
"Any passenger whose flight has been cancelled can also move to these operating flights, subject to availability.
"All flight changes can be made directly on Ryanair.com."
