EK77WNCL:
Oslo, a route I think NCL has been missing for quite a while, of course Ryanair have failed twice but you cant really say they actually flew to Oslo, apart from the fact the airports had "Oslo" written on them. Would probably need SK/WF codeshare.
Well, a connection between Oslo's main airport has been missing since Oslo, Fornebu closed down in October 1998. Braathens SAFE was the last operator in 1998. After OSL opened the NCL flight was moved to SVG and it was flown by Norwegian Air Shuttle with their Fokker 50s. This was before Norwegian Air Shuttle started 737 operation and Braathens was merged with SAS. Before Braathens SAFE it was Dan-Air that flew between Oslo (FBU) and NCL. This started in 1985 with routing MAN-NCL-FBU and was flown with their BAC One-Elevens. Dan-Air also flew NCL-SVG-BGO with BAe 146 at that time.
These days it's only four weekly flights between Norway and Newcastle (Wideroe from SVG) and around 2,000 passengers per month. I can't say anything other than BMI regional will not find a treasure chest here.