Is a passport required for your upcoming cruise? There are many...
The Benefits of Flying Dublin Airport
2. The bus system actually makes sense.
3.) The amount of friendly workers available.
4.) Ireland is the only country where you go through customs BEFORE your flight.
The US Preclearance (USCBP) facility at Terminal 2 in Dublin Airport is a purpose built facility that allows US bound passengers to undertake all US immigration, customs and agriculture inspections at Dublin Airport prior to departure.
Dublin Airport is one of only a handful of airports outside North America that offers a US Preclearance facility. The benefit is that having cleared USCBP, passengers arriving in the US are treated as domestic arrivals, allowing them to avoid immigration queues upon arrival and pick up their bags and go.