No. You can walk, swim, ride a train or go by boat.
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.
About 1 hour
about 13hrs20mn
A bit over 2 hours if you fly directly.
2hr 20min Oslo (OSL) to Paris (CDG) by a nonstop flight operated by SAS - Scandinavian Airlines System.
About a 1 hour and 30 mins.
About 2 hours if you fly directly.
You would fly over the Irish Sea and the North Sea.
About 2 hours and 30 minutes if you fly directly.
About 2 hours and 30 minutes if you fly directly.
A bit over 2 hours if you fly directly.
A typical flight between Frankfurt, Germany and Oslo, Norway would have a flying time of about 1 hours, 22 minutes.