Ryanair said it flew a record 17.4 million passengers in June, its highest for a single month and a 9% increase from a year earlier.
Its previous traffic record of 17 million was set in May.
The airline, Europe's largest by passengers carried, said it cancelled more than 900 flights, affecting some 160,000 customers, mainly due to air traffic control strikes last month.
Flights were on average 95% full in June, unchanged on a year earlier.
Ryanair said it flew a total of 96,250 flights in June.
