Book a ticket with an airline that travels between the UK and Ireland. Ryan Air offers the cheapest tickets. The airline is almost the equivalent of a bus and is used by many businesspeople. Aer Lingus is Ireland's main airline.
Bring your passport. American citizens are required to show a valid passport to travel between the two countries. British and Irish citizens need only provide an official photo identification.
Arrive at the airport one hour early. You will need adequate time to have your passport checked at the airline counter before proceeding through the security checkpoints.
Book a ferry ticket in any of the several port options. A ferry ticket for a pedestrian passenger in 2011 is around £50. A regular car passenger is around £200 and up. There a several factors that go into the cost of a vehicle passenger ticket, such as make and model of the vehicle, baggage, caravan or trailer and number of passengers.
Bring your passport. As with air travel, American citizens must show a valid passport to travel between the UK and Ireland.
Arrive at the ferry port an hour early to give yourself adequate time to have your passport checked.
