Guests whose tour travels from the Republic of Ireland to Northern Ireland (NI) will require an Electronic Travel Authorisation (ETA) for 2025 tours.
Guests visiting the Republic of Ireland (southern Ireland) from outside of the EU do not require an ETA unless they are travelling to Northern Ireland during the trip.
An ETA is a digital pre-clearance allocated to individuals who intend to travel to the United Kingdom (UK) for short stays. The process of obtaining an ETA is simple.