There are four international airports in Ireland, Dublin, Shannon, Cork and Ireland West. Dublin is connected to most of the major cities in US, UK, Canada, Continental Europe and Middle East. There are also domestic airports in Donegal, Galway, Sligo, Kerry and Waterford. The two major airlines that operate in Ireland are Ryanair and Aer Lingus. Regional service within Ireland is provided by Aer Arann, which has a few flights to UK as well.
There are cross border bus services operated by companies like Bus Eireann and Ulsterbus. Eurolines also operate services from Great Britain to Ireland. Bus Eireann has frequent bus services from Eastern European countries like Estonia, Poland, Lithuania and Latvia to Ireland. Among private travel options, Eirebus offers coach and car travel for the tourists.
The Enterprise service is jointly run by the Irish Rail and Northern Ireland Railways and it is the only cross border train that connects Belfast Central to Dublin Connolly. There is also a Rail-Sail Scheme which links the Stena Line or Irish Ferries with train companies of Great Britain and Ireland. The trains mostly operate from the UK cities and go via the Dublin-Holyhead, Rosslare-Pembroke and Rosslare-Fishguard sailing routes.
Cab or car services can be availed only if travelling from Northern Ireland to Ireland. One can hire a chauffeur driven car or can rent a one for yourself to travel to Ireland.
Ireland is served by numerous boat services from France and Great Britain. Irish Ferries travel from North Wales to Dublin and South Wales to Rosslare. The Stena line operates from Holyhead to Dun Laoghaire and Fishguard to Rosslare. Other major operators are Norfolkline, Irish Ferries and Brittany Ferries, Irish Sea Express, Fastnet Line and Celtic Link.