Ryanair managed to raise May passenger carryings by 6% to 12.5 million despite more than 200,000 travellers having flights cancelled due to air traffic control strikes and bad weather.
The budget airline was forced to cancel more than 1,100 flights last month against 43 in May 2017.
Chief marketing officer Kenny Jacobs said: “Regrettably over 200,000 Ryanair customers had their flights cancelled in May because of ATC strikes – mostly French, ATC staff shortages and thunderstorms.
“Ryanair calls for immediate EU Commission action to prevent more ATC strikes and staff shortages disrupting the travel plans of Europe’s consumers this summer.”
The airline saw its load factor in May rise by one percentage point year-on-year to 96%.
The airline’s rolling annual traffic total to May grew 8% to 132.1 million passengers.