The country's roads, airports and train stations were expected to be busy again today as 180,000 people make their way home for Christmas.
People are being urged to allow extra time for their journeys.
Iarnród Éireann estimated that up to 70,000 people will travel by rail today.
The organisation expected up to 400,000 people will have taken trains.
Bus Éireann said that up to 60,000 people were expected to travel today.
The bus organisation said that inter-city services would end by 7pm and local services by 9pm.
Up to 620,000 have travelled through Dublin Airport over the Christmas period.
More than 50,000 are expected to arrive at the airport today.
Shannon Airport is open tomorrow, with two flights due to land for refuelling.
Up to 35,000 will travel through the airport for the festive period.