There are always ways to find cheaper routes because the route is competitive or has less premium. Southeast Asia, East European and some of the South American parts tend to be of this category. Multiple international carriers tend to compete with each other and offer the cheapest business class destinations. These naturally low premium fare markets are usually advantageous to travelers who are willing to fly into different cities and alter their arrival airports. https://askforairlines.com/blog/cheapest-business-class-destinations/