Its reported that British tourists are queueing for "up to four hours" due to to the "botched introduction of tougher European Union border checks", noting that travellers from outside the Schengen zone are facing stricter vetting at the border.
The checks affect people entering and leaving the Schengen area, which allows passport free movement through much of the EU.
The change means the details of passengers from non-Schengen countries, such as Ireland and the United Kingdom, are run through databases to alert authorities if they are known to pose a threat.
Holiday makers are being asked to remain patient and give plenty of time to check in - following reports of Dublin Airport's extremely long queues and "four hour waits" as a direct result of strict security checks.
Airports popular with British tourists, including Paris, Madrid and Lisbon, could see queues stretching hundreds of metres as the lengthy checks are imposed on entry and exit.
The spokesman said Dublin Airport's "on time" performance for departing flights in June was 10pc better than the same month past year.
This has taken up to two minutes per passenger which has led to delays.
There is also said to be inadequate levels of staffing to ensure the checks get done quickly.
Time-consuming immigration controls and a shortage of border staff are being blamed for long delays at European airports for thousands of British holidaymakers.
The issue is compounded by a lack of border officials on the continent, it is claimed.
Pictures on social media in recent days have shown long lines of passengers in crowded terminals.
"Especially during the peak season of the year, travellers face long lines and can't get on their flights", commented Thomas Reynaert, Managing Director of Airlines for Europe (A4E).
And A4E warned that the situation could worsen in the coming weeks as the new regulations have not yet been fully implemented.
President of the Irish Airline Pilots' Association Evan Cullen said inadequate infrastructure at the airport is causing major bottlenecks.
We'd also like to hear from airport staff.
Around 350 staff from the private firm Eulen Seguridad work at the airport controlling queues, operating scanners and searching passengers.
ACETA, the association of Spanish air transport companies, said that, since 24 July, around 1,000 passengers had missed their flights.
United Kingdom holidaymakers are facing long queues at European airports because of tightened border checks.