Ex-Europe prices are generally not among the price leaders in premium cabins, however they're quite competitive in economy. While places like Egypt are much cheaper than western Europe, for whatever reason Norway is (maybe temporarily) the cheapest (in USD terms anyway) business-class origin point on the continent, up to fourteen hundred quid less than comparable UK departures. But Expert Flyer or the top tier on KVS is your guide, or you can toil away at the Oneworld online booking tool, which will give you actual pricing, including fees and taxes. You can save a "dummy" itinerary then re-open it, change the origin/destination cities, and see what it does to the bottom line.