Explore Northern Ireland's biggest draws—Belfast, Giant's Causeway, and Dunluce Castle—on a day trip from Dublin. In a traditional black cab in Belfast, you'll explore sites of the capital's conflicted history: the mural-strewn streets of the Falls and Skankill neighborhoods and the Belfast Docks.

Yes, a day trip to Belfast from Dublin is incredibly easy and highly recommended in 2026. The two cities are only about 165 kilometers (100 miles) apart. The most efficient way to travel is via the "Enterprise" train from Dublin Connolly to Belfast Lanyon Place, which takes about 2 hours and 10 minutes and offers a comfortable "city-center to city-center" experience. Alternatively, several express bus services (like Aircoach or Translink) run every hour and take roughly the same amount of time. A typical day trip allows you to visit the world-class Titanic Belfast museum in the morning, take a "Black Taxi Tour" of the political murals in the afternoon, and still have time for a pint at the historic Crown Liquor Saloon before heading back. Because there is no "hard border" between the Republic of Ireland and Northern Ireland, the transition is seamless, though you should remember that Belfast uses Pound Sterling (£) instead of the Euro (€) used in Dublin.