Travelling in Ireland by Bus Bus Eireann is Ireland's biggest bus company and runs services throughout Ireland. There are also a number of smaller companies and coach companies running services. Bus Eireann (Irish Bus) - Ireland's national service. Ulster Bus - covers services in Northern Ireland and also connect with Bus Eireann services.   Getting to Ireland | Bus | Car | Plane | Ferry | Train |  English   Francais   Deutsch   Italiano    Accommodation in the West of Ireland | Clare | Cork | Donegal | Galway | Kerry | | Leitrim | Limerick | Mayo | Roscommon | Sligo |  English   Francais   Deutsch   Italiano    Getting to Ireland     Bus     Car     Plane     Airports     Ferry     Train