Some cruises to Ireland that depart from the United States as of 2015 include the British Isles Grand Adventure cruises with Princess Cruises, the Florida to Copenhagen cruise with Royal Caribbean International and the Disney Cruises Eastbound Transatlantic Cruise. Cruise lengths can range anywhere between 30 and over 100 days.
Several different cruise options depart from the United States and sail to Ireland, according to CruiseCompete.com, a price comparison website for cruises. Princess Cruises offers several different options that sail to Ireland and other destinations as of 2015. It has two British Isles options: a 30-day trip and a 33-day trip. Both options sail the same route on the same ship, but the 30-day trip departs from Fort Lauderdale, Florida, whereas the 33-day trip sails from Houston, Texas. The cruise sails through destinations in England, Wales, Scotland, France and Ireland; Irish destinations include Cork and Belfast.
Royal Caribbean International offers a cruise route that runs between Fort Lauderdale, Florida and Copenhagen, Denmark. Although Ireland is not the final destination of the cruise, it makes a stop in Cork.
Disney Cruises also offers a transatlantic route that stops in Ireland. The cruise departs from Port Canaveral, Florida and sails to Dover, England. It stops in Dublin, Ireland and Liverpool, England.