North Korean national airliner Air Koryo will next year “substantially” raise ticket prices during certain peak tourism periods, a Beijing-based DPRK tour company said on Thursday.

A blog post by the Koryo Tours agency reported that the tour operators had been informed that flights between the Chinese and DPRK capitals during the Pyongyang Marathon, as well as “from 1 April to 10 May and from 1 September to 15 October,” will see fare hikes.

These time periods are generally considering some of the busiest for tourists, with the month of April featuring both the Pyongyang Marathon and celebrations of the