Without too much details: I'm trying to do A-B-C in plus, where both A and B is in the nordic countries. There is a one night layover in B on the outbound. There are direct flights A-C.

Dividing it into single tickets, SK is willing to sell me A-B-C and C-B-A separately at a small premium. SK will also sell me A-B r/t and B-C r/t separately at a huge premium (about twice the price).
Also, SK is willing to sell me A-B-C r/t routing in GO but not in plus (at least for some dates).


In general, the issue I'm trying to find a solution for is 2 segment trips from the nordics in plus where direct flights exists. SK booking engine seems reluctant. And OTAs which are good at doing routing, are bad at giving me plus tickets.