A one-way SailRail advance-purchase fare from Virgin Trains costs £39 ($64), departing Euston station in London for the Welsh port town of Holyhead, and including the connecting ferry to Dublin Port. Under-16s are half-price; under-5s free. The fast-ferry options are a little more expensive, but nowhere near as stable as Ulysses, and may be cancelled in rough weather. For a fee, the ticket can be extended to take you beyond Dublin via Ireland’s rail network, and there are options to book ferry passage with Swedish competitor Stena Lines. More: virgintrains.co.uk.