Passenger traffic at Ryanair rose 9 per cent to 10 million in December 2018, the airline said.
Load factor – a measure of how full the flights are – was 95 per cent. Ryanair operated a total of 57,000 flights in December.
Laudamotion, the airline founded by former Formula One driver Niki Lauda and in which Ryanair has a 75 per cent stake, carried 300,000 passengers over the month.
In total, Ryanair has carried 139.2 million passengers over the past year, an 8 per cent rise on the same period a year ago.