Aer Lingus carried 727,000 passengers in November, an increase of 8.3% on the same month last year. But the percentage of seats filled fell as the airline increased its route network.
Long-haul numbers grew by 18.9% to 113,000, while the short-haul figure was up 6.6% to 614,000.
But load factors - the percentage of seats filled - fell back by almost four points to 73.4%. The long-haul load factor dropped 6.7 points to 79.3%, while the short-haul figure was down two to 68%.
Aer Lingus said long-haul capacity had grown by more than 33% in the year - with new routes to the US - while short-haul capacity had risen by 15%.
