Well then, your rules are different from the set I have. Nowhere in the Advanced Game is this covered, and I don't see any exception for Norway in the Basic Game (other than the fact that it only uses the southern chunk of the map). In my Advanced Game rules, all it states is, "After five moves, the Flight is out of fuel." It mentions sweet f-all about what happens after that.
Using the Basic Game rules is the only thing that makes sense because the long range targets would be suicide missions, but they were attacked without concerns for fuel consumption. I see no mention of exempting Norway from the list of eligible airfields, although I would understand restricting them to Luftflotte 5 only.
as in the rules
1 black die for each square from any friendly airfield ,except norway
any german crosses ,plane has ditched