Every Irish airport saw passenger growth in 2017 except for Shannon, which saw a decrease of 5% from January to June.
CSO figures for the second quarter of 2017 saw Cork, Dublin, Knock and Kerry airports all increase their passenger numbers compared to the same period last year.
Shannon traffic is on par with last year if transit passengers are included.
Dublin increased more than 7% to 7.9 million passengers in the second quarter, while Cork increased about 2% to 637,000. Shannon, which is independent of the Dublin Airport Authority (DAA) unlike Dublin and Cork, saw its numbers for the second quarter fall by 5.5% to 455,000 compared to the same period in 2016, while its traffic from January to the end of June this year fell by 5% overall to 727,000.