Save for two modern Tu-204 aircraft, Air Koryo's fleet is comprised of vintage soviet aircraft (IL-62, Tu-134, Tu-154) which have long been banned in the European Union, officially out of concerns regarding safety (although politics probably played a role too.)

These vintage aircraft were primarily operating services between China and Pyongyang (with additional seasonal flights to Malaysia, Russia, and a couple other destinations.)

The Chinese government has just enacted a ban similiar to the EU's, which effectively marks the end of an era. Service to Beijing will continue on the Tu-204s but the opportunities to fly on vintage aircraft have now largely diminished.

The older aircraft will continue to operate within the DPRK, although arranging domestic trips isn't trivial, and I would actually be more concerned about safety now that these planes will fly less. (For all its bad reputation, Air Koryo hasn't had an accident since the 80s and provides very decent service.)

See http://www.nknews.org/2013/01/north-...nese-airports/