The Irish Sea Crossing: How Many Ferries Connect Ireland and the UK?

 

The Irish Sea Crossing: How Many Ferries Connect Ireland and the UK?: A Complete Guide

In the same way as with traveling and logistics companies, sea connections between Ireland and the United Kingdom make up the backbone of the economy of both the Irish and the Celtic Seas. Being separated by land and therefore lacking any land connection between themselves, only ferries are an option to take instead of planes when traveling with cars, trucks, foot passengers, and animals. However, when choosing which ferry line you want to use to travel from Dublin to Holyhead or from Belfast to Liverpool, one thing comes to mind – how many ferry lines connect Ireland with the United Kingdom at all? In general, there are currently 7 main car ferry lines along with a number of others that work seasonally or transport cargo.

For a clearer idea, let’s examine the case of transport to regional airports in England. In the same way that one may organize a Luton Airport Taxi from Hemel Hempstead to ensure an efficient transfer to their airplane by land, ferry services provide reliable connections between certain ports on schedule. But while taxis are capable of maneuvering through any road, ferry services are bound by the infrastructures available at particular harbors. Over the last decade, the number of connections has changed based on issues such as Brexit documents, prices of fuel, and increased demand after the pandemic, but the service is still extensive as of 2026.

The Core Routes: Republic of Ireland to Great Britain

The most crowded corridor is between the Republic of Ireland and mainland Great Britain (including England, Scotland, and Wales). There are currently four primary routes running on an annual basis:

Dublin to Holyhead (in Wales) – operated by Irish Ferries (with crossing time of about 2.5 hours, using fast ferry) and Stena Line (3.5 hours with conventional ferry). The most frequently used route, up to 8 sailings daily.

Dublin to Liverpool (in England) – operated by P&O Ferries. Crossing time – about 8 hours (overnight and daytime). Very cargo-oriented route, but accepting pedestrians also.

Rosslare (in Wexford county) to Fishguard (in Wales) – operated by Stena Line. Crossing time – 3.5 hours. It's a scenic, less busy alternative to Dublin-Holyhead.

Rosslare to Pembroke (in Wales) – operated by Irish Ferries. Crossing time – 4 hours. Preferred option for carrying campervans and caravans.

Four annual car-ferry routes from the Republic of Ireland. Two seasonal routes run from May to September, Rosslare to Rosslare... no wait! Corrected info: Rosslare to Cherbourg (France). No UK ports for seasonal travel, sorry. There's Dublin to Douglas (Isle of Man), summer only and Crown Dependency of the United Kingdom, but not part of Great Britain proper.

Northern Ireland to Great Britain: Three Key Crossings

However, taking Northern Ireland into account (as a part of the UK), the number of ferry routes rises noticeably. Currently, there are three major ferry lines connecting Northern Irish ports with the mainland:

Belfast to Cairnryan (Scotland): operated by Stena Line. Journey duration is 2 hours 15 minutes. This line features the shortest crossing time and most ferries per day (up to six).

Belfast to Liverpool (England): operated by two companies - Stena Line (8 hours) and P&O Ferries (8 hours).

Larne (County Antrim) to Cairnryan: operated by P&O Ferries. The duration of the journey is 2 hours.

That is three ferry routes from Northern Ireland to Britain. Note that the route Larne-Cairnryan is sometimes regarded separately from Belfast-Cairnryan (though the destination ports are different, they have the same start point), thus we may count all the ferry routes from the island of Ireland to Britain (with the Republic of Ireland included) as 4+3=7 permanent car ferry routes. Besides, there is freight-only ferry service (Dublin to Heysham) and foot-passenger only catamaran ferries, which operate seasonally.

The "Hidden" Crossings: Ireland to Scottish Islands & Isle of Man

As an option for the more daring visitor, one could consider traveling through island-hopping. For instance, there is a ferry from Ballycastle (NI) to Campbeltown (Scotland) via Kintyre Peninsula? This route is no longer operational. There are, however, two routes which currently operate:

Causeway Coast Ferries offered transport services from Portrush to Port Ellen – now extinct.

Ferry transport from Dublin to Douglas (Isle of Man), followed by Douglas to Liverpool or Heysham. This constitutes another technical extra ferry, but does not qualify as an Ireland-to-UK ferry. Likewise, there was transport available from Warrenpoint (NI) to Heysham (England), but this ferry service is reserved strictly for goods.

For passenger transportation, the total ferry count is 7.

How to Choose the Right Ferry for Your Journey

The choice among these seven options will depend on your point of origin, budget, and willingness to experience boat movement. As an illustration, while the Dublin-Holyhead fast ferry takes the shortest time, it may be subject to cancellation due to bad weather conditions. While the Belfast-Cairnryan option will give you the advantage of accessing the Scottish road network, it would make sense for you to take Rosslare-Fishguard if you are departing from southern Ireland. In addition, you should consider how you are going to access your point of destination in England when making the decision. For instance, a person arriving in Holyhead may require rail connections to access London, but one arriving in Liverpool may be able to arrange for a Hemel Hempstead to Heathrow Airport transfer using the M6 and M1 motorways from the north-west.

Seasonal Variations and Future Changes

It should be pointed out that the figure of seven routes relates only to the summer schedule (April-September). During the winter schedule (November-February), the frequency of certain routes may be cut down, but no route is completely shut down except the seasonal night crossing between Rosslare and Pembroke. New routes have been suggested for 2027, which would bring the total number to nine if both are put into operation; they are a direct Cork-Milford Haven route and a Larne-Troon ferry service. Older ships will perhaps go out of use owing to fuel taxation and emission laws (Fit for 55 from the EU).

Also read: What's It Like Living in London, UK? 10 Things You Must Know Before Moving There

Conclusion: 7 Reliable Ferries (Plus Freight)

In response to the question posed originally, there are now seven ferry routes from Ireland to the UK that run all year round. These include four between the Republic of Ireland and Great Britain: Dublin-Holyhead, Dublin-Liverpool, Rosslare-Fishguard, Rosslare-Pembroke, and three between Northern Ireland and Great Britain: Belfast-Cairnryan, Belfast-Liverpool, and Larne-Cairnryan. The rest, which are either freight ferries, seasonal or hopper ferries, only amount to three or four more, yet do not allow non-cargo carrying vehicles unless permission is granted prior to boarding. Whether one is moving house, going on a camping holiday using a campervan, or trying to avoid air travel, the aforementioned routes still serve as the lifeline connecting Ireland and the UK.