Aer Lingus passenger numbers fell by 5% last month when compared with November last year.
The number of short-haul passengers, including Aer Lingus Regional, in November 2013 were 647,000, a decrease of 4.7% on November 2012, while long-haul passengers in November 2013 were 81,000, a decrease of 6.9% on November 2012.
The company says the numbers are in line with their expectations and say they are not forecasting any improvement in short haul for the rest of the year due to heavily discounted fare offerings across Europe.
"We do not expect any improvement in the short haul environment for the rest of 2013 which remains characterised by heavily discounted fare offerings across Europe," the company stated.
"The 2013 outlook on long haul remains positive with the exception of some weakness expected in November".
Aer Lingus mainline’s flown passenger load factor in November 2013 decreased by 3.3 points on November 2012 to 73.3%.
Short-haul flown load factor was 68.6%, a decrease of 1.9 points on November 2012, with capacity decreasing 3.5%.
Long-haul flown load factor was 80.0%, a decrease of 5.7 points on November 2012, with capacity increasing 0.8% on prior year.