Aviation authorities in the Irish Republic say flights in and out of the country will be banned because of possible risks from volcanic ash.
The fresh restrictions will apply from 0600 to 1200 GMT on Tuesday.
“Ireland falls within the predicted area of ash concentrations” that exceed acceptable levels, the Irish Aviation Authority (IAA) said on Monday.
Flights over Europe were banned for six days last month because of fears of the effect of volcanic ash on jet engines.
The IAA said over-flights from the UK and continental Europe would not be affected.