Destinations
Where cruises from London actually go
Most cruises from London go north: around the British Isles and Ireland, up the Norwegian coast to the fjords and the North Cape, or across the North Sea to Copenhagen, Stockholm and the Baltic. Most of those are 14 nights, and many are one-way. Fewer go south, along the coasts of France, Spain and Portugal to the Canaries or into the Mediterranean, and the longest join two trips into three or four weeks. The counts on each card come straight from the schedule.

Long voyages and Iceland
Three weeks and more. Most are Holland America's 28-night round trips from Dover, which follow one of its 14-night itineraries with another, such as the British Isles and then Norway, before coming back to Dover. Seabourn sells voyages of up to 40 nights; several end in Reykjavik, and the longest calls in southern Greenland first. Viking joins its British Isles and Scandinavia trips into 21 and 28 nights ending in Amsterdam or Stockholm. Regent's 12-night trip from Dover around Iceland to Reykjavik is here too.
51 sailings · 12 to 42 nights · from $4,114

British Isles and Ireland
Mostly Viking's 14-night trips around Britain and Ireland, March to September. They leave Greenwich or Tilbury and are one-way: the British Isles Explorer calls at Dublin, Holyhead, Liverpool and Belfast, then goes around Scotland by Ullapool, Kirkwall, Edinburgh, Aberdeen and Lerwick to end in Bergen, and British Isles and Ireland ends in Belfast after Cobh, Foynes and the west coast. Holland America sails round trips from Dover, Seabourn sails from Dover and Greenwich, and Carnival has a 9-night round trip from Dover by Liverpool, Greenock for Glasgow, Belfast, Dublin and Cobh.
46 sailings · 9 to 14 nights · from $1,127

Baltic and Scandinavia
Round trips from Dover to Copenhagen, Stockholm, Helsinki and Tallinn, with Warnemunde on most, mostly from June to September. Carnival's run 8 to 12 nights, often calling at Le Havre or Zeebrugge on the way out; Holland America's are 14 nights and add Oslo, Aarhus and Visby, or Gdynia, Klaipeda and Riga. Seabourn's are one-way and end in Copenhagen.
21 sailings · 7 to 20 nights · from $1,069

Norwegian fjords
Holland America's 14-night round trips from Dover cross the North Sea and go up the coast past the Arctic Circle to Tromso and Honningsvag for the North Cape, with Alesund, Andalsnes and Trondheim on the way, mostly from May to July, with a few in October and December. Viking sails one-way from Greenwich to Bergen in the midnight-sun weeks of early summer, and from Tilbury to Tromso on 12-night northern lights trips in January and February. Seabourn and Azamara add a few more.
19 sailings · 12 to 18 nights · from $2,529

Mediterranean
One-way trips south, mostly Viking's from Tilbury and Greenwich between late August and early October: 7 nights to Barcelona by Vigo, Malaga and Cartagena, 18 nights along the coasts of France, Spain and Portugal to Barcelona, or 19 nights on through Italy and the Adriatic to Venice. Carnival and Holland America have a few from Dover that end in Barcelona or in Civitavecchia for Rome. Plan the flight home from where the ship ends.
12 sailings · 7 to 19 nights · from $783

Western Europe and the Canaries
Holland America's 14-night round trips from Dover in spring and fall, south to Lisbon, Agadir in Morocco, Lanzarote, Tenerife and Madeira. Viking adds 11-night one-way trips from Greenwich and Tilbury down the Atlantic coast by Bordeaux, Bilbao and La Coruna to Lisbon.
8 sailings · 11 to 14 nights · from $2,369
Cruises from London to a port or country
Every sailing that calls at the place, whichever region it falls under, from the ports of call each line publishes.
Starting fares in US dollars per person, for the cheapest cabin listed, with taxes and port fees included, checked . Fares change often, so check the current price before you book.