Currently there are direct flights from Ibiza to Norway:

Ibiza to Oslo

Flights from Ibiza to Norway with one stopover.

Flights via Barcelona (BCN)
From Ibiza (IBZ) with Vueling Airlines
OR
From Ibiza (IBZ) with Iberia Airlines
Transfer at Barcelona (BCN) Then on to Stavanger (SVG) with Vueling Airlines
OR
Then on to Stavanger (SVG) with Iberia Airlines
Flights via Amsterdam (AMS)
From Ibiza (IBZ) with KLM Airlines Transfer at Amsterdam (AMS) Then on to Stavanger (SVG) with KLM Airlines
OR
Then on to Bergen (BGO) with KLM Airlines
Flights via Oslo Gardermoen (OSL)
From Ibiza (IBZ) with Norwegian Airlines Transfer at Oslo Gardermoen (OSL) Then on to Tromso (TOS) with Norwegian Airlines
Flights via London Heathrow (LHR)
From Ibiza (IBZ) with British Airways Transfer at Heathrow (LHR) Then on to Bergen (BGO) with British Airways