Luxembourg is easily accessible in a day from London and the southeast. Nearly all ferries from Britain to the continent take cars, as does the Channel Tunnel train (www.eurotunnel.com). Several companies operate sailings direct to the Belgian port of Oostende and the French ports of Calais and Dunkerque.
Transeuropa Ferries. Transeuropa Ferries offers about 3 services daily from Ramsgate to Oostende. www.transeuropaferries.com.
P&O Ferries. P&O Ferries has around 20 sailings a day in each direction between Dover and Calais. www.poferries.com.
Fares vary considerably according to season, journey time, number of passengers, and length of vehicle. However, by traveling off-peak, early in the morning or late evening, or in June and September, you can reduce costs.