Ryanair said it flew 9% more passengers in August than a year ago, with its purchase of Austrian carrier Laudamotion helping offset the impact of strikes and staff shortages.
The airline said it flew a total of 13.8 million passengers last month, including 500,000 on Laudamotion. This was up from 12.7 million in August of last year.
Its load factor - how many seats it fills on each flight - was 97%, unchanged from the same time last year.
Ryanair came to terms with its Irish pilots late last month after strikes and shortages caused 550 flight cancellations in August compared to just 27 a year ago.
Shares in the airline were lower in Dublin trade today.
Meanwhile, traffic at another European budget carrier, Wizzair, which competes with Ryanair in eastern Europe, was up 20% year on year.