As far as I know there is no ferry service between Dover and Belgium anymore. From Dover you have a ferry to Calais in France.
22 miles
About 280 miles.
By road, 77.2 miles.
About 100 miles
about 390km
How far is Amsterdam from Hamburg?
about a 10 minute ride by taxi
the coastline distance from southall to dover is approx 78 miles which is 1-3 hours drive
From Dover it is 514 miles
About 75 miles
3900 miles