Aer Lingus grew passenger traffic by 0.9% in November against capacity cuts of 1.1%, leading to a 1.5 percentage point rise in load factor to 76.6%.
Its short-haul business - excluding Aer Lingus Regional - saw year-on-year traffic fall by 6.8%, while its long-haul business grew by 12.4%.
Load factor for short-haul dropped by 3.1 percentage points to 70.5% and long-haul recorded an 8.4 percentage point increase to 85.7%.
Aer Lingus Regional, operated by affiliate Aer Arann, recorded year-on-year passenger growth of 28.4%.
Total passenger numbers across the group grew by 2.1% to 766,000 for the month.