Direct flights from Britain, Europe, and the USA arrive at the main hub, Dublin Airport. There are also airports in Shannon, Cork, Knock, and Belfast—and smaller regional airports such as Donegal and Sligo. The main airlines operating flights between Britain and the Republic of Ireland are Aer Lingus and Ryanair. It is also possible to ferry from Britain or France, sailing into Dublin, Rosslare, or Cork. The main operators are Irish Ferries, Stena Line, P&O, Brittany Ferries, and Norfolk Line Ferries.
Distances are not huge, and highways link the main cities. Car rental is readily available and is recommended for sightseeing for at least some of your trip, as it allows you to go to the more interesting places and stop off when you want. Note that car rental and fuel can be expensive (book ahead in high season). Other options include trains, which link the larger cities and are usually reliable, and intercity buses, which serve the main towns and cities. Many private bus companies operate on these routes, too. There are flights between Dublin and all of the regional airports. Drivers drive on the left side of the road in Ireland, and some rural and coastal roads can be narrow.
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