Passenger numbers at Dublin Airport are expected to surpass the 400,000 mark for the first time ever over the Bank Holiday weekend.
Passengers travelling through the airport are asked to avoid causing delays by ensuring they do not have prohibited items, such as scissors, toy guns and liquids, in their hand luggage.
Aer Lingus have advised people to give themselves extra time when heading to the airport to jet away.
Those taking European flights are advised to arrive at the airport two-and-a-half hours before takeoff, while those heading across the Atlantic should give themselves an hour more.
Passengers taking advantage of US Preclearance are advised to complete it two hours before takeoff.
The Irish Travel Agents Association said the passport queues at Dublin Airport are an example of growth in the Irish travel sector.
The airport saw a record 27.9 million passengers pass through last year, up 11% on 2015.
Passenger numbers reached 2.9 million in June, a 6% increase on the same month last year, making it the busiest June in the airport's 77 year history.
It comes as Irish passengers have reported long delays in some European airports due to increased security measures.
The security measures apply to those travelling between countries within the Schengen area.
New border control checks in Schengen Area causing delays at certain European airports, these do NOT apply @DublinAirport biz as usual today
— Dublin Airport (@DublinAirport) August 2, 2017
Ireland is one of a small number of countries in the European Union that is not a part of the Schengen area, but Irish passport holders may experience knock-on delays.
The increased security measures are a result of recent terror attacks.
A spokesperson for the European Commission said the delays are the price of security and that member states had time to prepare for them prior to the busy holiday season.
Separately, Ryanair boss Michael O'Leary has warned that European airlines are opposed to the UK getting "any favourable deal" to secure air routes after Brexit.
