The number of passengers carried by Ryanair fights rose 8 per cent last month, the airline said, with the company carrying 13.6 million people in June.
The airline had a load factor – a measure of how full flights are – of 97 per cent.
In total, Ryanair Group flights carried 14.2 million people, with the additional 600,000 accounted for by Laudamotion, Ryanair's Austrian subsidiary.
Ryanair took control of Laudamotion in January, having previously owned a 75 per cent stake in the airline. It was founded by the late Formula One motor racing driver Niki Lauda.
Rolling annual passenger totals are now 10 per cent higher at 146.5 million, the airline said. It operated almost 78,000 scheduled flights in June.