The distance between the above mentioned places is 219.8 miles approximately. The distance is straight path from one place to another place. There might be slight difference between the actual distance and the above mentioned distance because of the route chosen.
30 miles
About 150 miles.
About 450 miles
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.
About 280 miles.
about 390km
By road, 77.2 miles.
22 miles
About 100 miles
5049 mi
54 miles
I believe about 40 miles.