E18

In the United Kingdom, E routes aren't signposted as such, neither is this route.

The route starts in Craigavon ​​in Northern Ireland, just south of the island's largest lake, Lough Neagh. It runs along the M1 motorway via Lisburn, where it joins the European route E1, to Belfast. It continues along M2 together with E1 and joining E16, forks off by the A8(M) and follows A8 to the port of Larne. It then crosses the North Channel to Cairnryan on the Scottish side, a few miles north of Stranraer along A77.

From Stranraer the routes follows A75 to Newton Stewart, passes north of Kirkcudbright and continues via Castle Douglas to Dumfries. Still along A75 the route goes via Annan to Gretna, where it leaves Scotland for Cumbria of England.

In England, the route first follows M6 to Carlisle together with E5. From there, it runs along A69 via Brampton, Haltwhistle, Hexham and Corbridge to Newcastle upon Tyne on the east coast of North East England.

At Haltwhistle, Hadrian's Wall, as well as Northumberland National Park, are only a few miles away. Housesteads Roman Fort, 7 miles east of Haltwhistle, is the most complete Roman fort in Britain. Also the old Roman road known as the Stanegate passes near the town.

As there might not be any ferries along the official route, you should check whether there are any connections between the UK and Scandinavia. Denmark should be your first choice after Norway, otherwise you probably have to drive from the Netherlands.

After crossing the North Sea (or the English Chanel, and perhaps Skagerrak), the route continues in Norway from Kristiansand via Arendal, Porsgrunn, Larvik, Sandefjord, Tønsberg, Horten, Drammen and Oslo (the capital of Norway) to Ørje on the Swedish border and onward east from Töcksfors via Karlstad, Örebro, Västerås and Enköping towards Stockholm, the capital of Sweden.

With a ferry connection from Kapellskär in Norrtälje (you could also use the ferries from Stockholm), the route goes via the Åland Islands over the Archipelago Sea to Naantali by Turku (from Stockholm: to Turku) on the south-west coast of Finland. From here, the road continues east via Helsinki (the capital of Finland) to the border between Finland and Russia. The Finnish leg of E18 is motorway except for a few short stretches. The south coast, along which the road runs, is characterised by towns and agricultural landscapes with a legacy from medieval times.

Most ferries to Finland are floating palaces, similar to cruise ships, with entertainment, restaurants and shopping options. If you skip Åland, the passage takes about 11 hr, depending on route, mostly through archipelago – you will want to spend some time enjoying the views. The passage across the Sea of Åland itself, from Norrtälje to Eckerö, is considerably shorter.

The E18 goes from Kapellskär to Naantali, but you could use any of the ferries to Åland or via Åland to mainland Finland. Many of the ferries call at Mariehamn, Åland's capital and only town. You might want to do the town and continue with the next one (in the night or the next day). An alternative is to take a ferry to Eckerö and do more of Åland.

Naantali has a nice wooden old town full of cafés and souvenir shops. There is a Moomin theme park. The E18 leads straight away from the town, along the Turku bypass.

Turku is one of Finland's major cities, founded in medieval times and until the 1850s bigger than Helsinki. Turku is also a good base for tours to the Archipelago Sea.

In Piikkiö, 15 km past Turku centre, E18 joins Highway 1 between Turku and Helsinki. Alternative roads between the cities include road 110 (former Highway 1 and E18) and the historic Kings Road. If you want to see the towns and landscapes, these are better than the motorway, and road 110 is not too much slower. Much of the time they run quite close one to another.

The roads continue via Paimio to Salo, former headquarters of the mobile phone company Nokia, on to Lohja by the lake Lohjanjärvi, by Nuuksio National Park, which despite its small area features many of Finland's typical natural landscapes, and to Espoo and Vantaa by Helsinki.

After Helsinki, E18 joins Highway 7 and leads to Porvoo, another of Finland's oldest cities, Loviisa, with Finland's first nuclear plants, Pyhtää, through which the border between Sweden and Russia run 1743–1809, Kotka, an important port city, Hamina, also once a border town, and to Vaalimaa border crossing. All these towns are by the coast, with nice archipelagos. Off Pyhtää, Kotka and Hamina is the Gulf of Finland National Park.

On the Russian side, the route joins Highway M10 and continues by Vyborg, founded in Swedish times and one of Finland's most important cities when ceded to the Soviet Union, over the Karelian Isthmus to the western border of Saint Petersburg, where it ends.

• European route E4 Spans 1,590 kilometres between Haparanda in the north and Helsingborg in the south.
• European route E6 shares as bit of road with the E45 near Gothenburg. The route runs all the way from Trelleborg to Kirkenes in the far north-east of Norway, close to Russia. The road is very scenic, running through fjords and mountains, and for 1,000 km in the Arctic.
• European route E8 from Turku in south-western Finland to Tromsø in Norway, along the Finnish west coast and by the rivers at the border to Sweden.
• European route E10 meets the E45 in Gällivare, Sweden, from which it connects to Luleå and Å in Norway.
• European route E12 from Mo i Rana in Norway to Helsinki in Finland, with a ferry over the Gulf of Bothnia, in Norway and Sweden following the Blue Highway.
• European route E14 connects Trondheim with Sundsvall, and as such its length of 449 km is entirely in Scandinavia.
• European route E16 , like some other E-routes listed below starts in the British Isles and officially crosses the North Sea by boat to Bergen, albeit as of 2020 there are no ferries plying the routes of such E-roads (ie. between a pair of ends of the roads). From Bergen it makes up the main road to Oslo, then it goes north a bit, crosses into Sweden and ends in Gävle.
• European route E20 comes in from the UK to Esbjerg, and the Scandinavian section crosses Denmark west to east, then crosses Öresund bridge from Copenhagen to Malmö. Then E20 connects Sweden's three biggest cities, going up to Gothenburg (together with E6), then to Stockholm before crossing by ferry to Tallinn.
• European route E22 is one of the longest European routes going from the UK deep into Asian Russia. The Scandinavian section goes from Trelleborg along Sweden's southern and eastern coasts to Norrköping where it's supposed to cross the Baltic Sea to Ventspils, Latvia (no ferry for this exact leg either).
• European route E39 stretches from Nørresundby in Denmark to Trøndelag in Norway and like the E6, the route crosses through many beautiful fjords and mountains.
• European Route E45 is among the longest north-south highways in Europe, stretching from Gela in southern Italy to Alta in northern Norway.
• European route E63 is completely in Finland. It goes northeast from Turku along highway 9 to Kuopio, then follows highway 5 up to Sodankylä.
• European route E75, from Sitia in Greece to Vardø in Norway, follows Highway 4 through Finland.