New figures show that just over 3.4 million passengers travelled through Dublin Airport in August - an increase of 12% on the same time last year.
Dublin Airport recorded its second busiest ever day in August with just under 119,000 passengers travelling through on Sunday August 13.
The figures from daa, the operator of Dublin Airport, also show that around 12% more passengers have passed through Dublin Airport so far this year compared to the first eight months of last year.
Passenger numbers in the eight months to August totalled 22 million, with almost half of those (10.1 million) travelling during the busy summer months of June, July and August.
The daa said the top ten most popular destinations for departing passengers from Dublin Airport this summer were London Heathrow, London Gatwick, Amsterdam Schiphol, Malaga, Faro, London Stansted, Manchester, Edinburgh, Birmingham and Barcelona.
Meanwhile, a total of 308,000 passengers flew to and from Cork Airport in August, a 14% increase on August last year and marking the busiest August for passenger traffic since August 2008.
The daa said that Tuesday, August 8 was the busiest day of August at Cork Airport. It was also the busiest day of the year so far with almost 13,000 passengers flying.
The top 10 most popular destinations for departing passengers from Cork Airport over the three months of June, July and August were London Heathrow, London Stansted, Amsterdam Schiphol, Manchester, Faro, Malaga, Edinburgh, London Gatwick, Birmingham and Barcelona Reus.
Today's figures also show 79% of flights left Dublin Airport on time, while 96% left Cork on time, while baggage returns took 20 minutes in Dublin and just seven in Cork.
Kenny Jacobs, the daa chief executive, said that passengers have been very positive about the standards they have received in Dublin Airport over the summer.
He said that 97 out of every 100 passengers got through security screening in under 20 minutes, which was even better than the 90% target the airport had set for itself.
"Demand for travel remains high for the coming weeks and months. While the return to school marks the end of the peak summer period, September is set to remain busy as older families and younger couples set off to enjoy some autumn sunshine in the likes of the Mediterranean and the Canaries," he said.
Business travel levels are also set to remain high over the months ahead, he added.
He also said that as Cork Airport approaches the 2 million passenger mark this month, traffic at the airport is forecast to be just as busy through a combination of those jetting off in search of sunnier climes and fans travelling to France for the Rugby World Cup.