The Dublin to Belfast railway line is a key transportation route connecting the capital cities of the Republic of Ireland and Northern Ireland. Operated by Irish Rail and Translink, the line covers approximately 100 miles and offers regular services for both commuters and tourists. Traveling along this line provides scenic views of the Irish countryside, making it a popular choice for those wishing to explore the region. The journey typically takes around two hours, with several stops along the way, including cities like Drogheda and Newry.