Check out the many travel Web sites that offer comprehensive rail-and-ferry packages to Ireland, such as Stena Line or Irish Ferries, for timetables and prices. This will help you determine which path of travel is most appealing to you. You can also book train travel from London to Dublin by calling Rail Europe at (888) 382-RAIL or by visiting the link below.
Book travel by the most direct route, called the Central Corridor, for the fastest way to get from London to Dublin. This requires crossing the sea at Holyhead, Wales, for a ferry trip of one hour and 40 minutes to Dun Laoghire, located very near Dublin.
Opt for one of the less direct routes, such as the Northern Corridor, if you want to see more of the British Isles during your journey. The Northern Corridor crosses the ocean from Scotland into Belfast, Northern Ireland.
Pick your ferry and train voyages separately for the ultimate in flexibility, although doing so will almost definitely cost more money.
Defer to a travel agency to create the best possible package for your needs.
Choose first-class accommodations on both the trains and the ferry to ensure that you're well-fed and comfortable every step of the way.
Consider alternative forms of crossing the ocean, such as high-speed catamarans or speedboats, for a more thrilling adventure.