It seems some airlines do use the NK airspace. Despite being a horrible place in every regard, it's not exactly a war zone, and Pyongyang has no incentive to s

It seems some airlines do use the NK airspace. Despite being a horrible place in every regard, it's not exactly a war zone, and Pyongyang has no incentive to shoot down passing passenger aircrafts. But I think the whole heavily guarded SK-NK border is a no-fly zone: it limits the usefulness of NK airspace greatly, because any plane flying toward Incheon (or some other South Korean airport) from North will have to take a detour anyway.