Just under 1.9 million passengers passed through Dublin Airport in September, a 4% increase on the same period last year, according to the Dublin Airport Authority.
Passenger volumes to and from continental Europe increased by 2% with just over 1 million passengers travelling to continental European destinations during the month.
Almost 612,000 passengers travelled to UK destinations in September, which was 5% more than the same period last year.
Transatlantic traffic to North America increased by 10% in September with more than 197,000 passengers travelling on this route sector last month. Traffic to other international destinations, which comprises flights to the Middle East and North Africa, increased by 2% to 45,000.
The number of passengers taking domestic flights increased by 20% off a low base as just over 7,000 people took domestic flights last month.
So far this year, almost 15.6 million passengers have travelled through Dublin Airport, a 5% increase when compared to the same period last year.