At present, passengers travelling to Ireland require a valid test result (subject to limited exemptions). This requirement has been introduced on a temporary basis as part of our response to emergence of the Omicron variant. Travel requirements are kept under regular review based on the evolving international epidemiological situation and as understanding of the Omicron variant develops.
Depending on a person's travel history and health status, tests that may be accepted for travel can be a negative PCR test taken within 72 hours prior to arrival or a negative antigen test taken within 48 hours prior to arrival. These timeframes are consistent with advices of the EU and the ECDC on travel related testing and with the aims of reducing in transit or travel related transmission of COVID-19.
Full details on international travel policy and the types of tests accepted are published at www.gov.ie/travel.