About 1 hour.
About 2 hours if you fly directly.
Over a thousand miles!
London to Brussels is about 200 miles.
102 miles
600 hundred km
About 4 hours via plane
From Frederikshaven to Larvik is about 160 km.
Flying is easiest.
1071 miles
You need to fly to Norway first. If you fly to Oslo, it takes 3 hours from Svalbard to Oslo, and another 2 to London.
Oslo is about 4 040 kilometers away from equator.