Travellers can go from Scotland to Ireland by ferry with either of two companies. P&O operates two Irish Sea crossings: Troon to Larne and Cairnryan to Larne. StenaLine operates one crossing: Stranraer to Belfast. Both companies offer comparable prices. As of 2010, P&O has fares from £78 (£79) one way. StenaLine has fares from £68 (£69) one way. Prices vary depending on passenger numbers. During off-peak times, ferries may be quieter and cheaper. Vehicle size and number of passengers per vehicle may also affect prices.
P&O offers a fast and a slow service from Cairnryan in Dumfries and Galloway to Larne in Northern Ireland. The slow service is not necessarily cheaper. P&O Express does the crossing in one hour (service runs from March to October only). P&O Superferries do the same route in 105 minutes. P&O Express also goes from Troon in Ayrshire to Larne. This trip takes two hours and is available from March to October only. Prices are from £78 (£79) one way for one car and driver (this is a web economy single fair). Additional adult passengers cost £19 (£20), and additional child passengers cost £9 (£10). Ferry crossings run throughout the day. Book online: poirishsea.com or call: 0871-66-44-777 in the UK or 01-407-34-34 in the Republic Of Ireland.
StenaLine Ferries operates a fast and a slow service from Stranraer in Dumfries and Galloway to Belfast in Northern Ireland. The slow service is not necessarily cheaper. The fastcraft ferry HSS Stena Voyager takes 120 minutes. The Superferries, Stena Caledonia and Stena Navigator, travel the same route in 170 minutes. Prices are from £68 (£69) one way for one car and driver (this is an Economy online motorist fare for a car under 6m long plus a driver when booked early). Ferry crossings run throughout the day. Book online: stenaline.co.uk or call: 08447-70-70-70 in the UK and in Northern Ireland.
Other web-based companies offer prices for the Scotland to Ireland crossing (though the journey will still be with P&O or StenaLine). These websites include Ferry-to-Scotland on posf.co.uk and A Ferry UK on aferry.co.uk. The prices offered are no more competitive than buying direct with P&O and StenaLine. Alternatively, travellers can take a ferry to Ireland from England. The company Irish Ferries travels to Dublin from Holyhead and to Rosslare from Pembroke. P&O and StenaLine also offer crossings from England.