Aer Lingus passenger carryings rose by 2% in June to 918,000 over the same month last year.
Total numbers, including Aer Lingus regional operations, increased by 4.8% to 1.013 million.
Short-haul passenger numbers were flat year on year at 819,000, while long-haul carryings increased by 12.5% to 99,000.
Aer Lingus Regional’s total-flown passenger numbers were up by more than 41% at 95,000.
The June load factor increased by 3.8 points to 82.6%. The short-haul load factor was up by 1.4 points to 78.1%. The long-haul load factor was up by 9 points to 92.4%.