Excellent article! I'm glad you got to enjoy. I am a strong advocate for world traveling. I plan on publishing a piece about my latest trip soon. The price of flying is quite peculiar. Even from city to city within the USA, there seems to be little rhyme or reason for it (example: Chicago to New York costs less than Chicago to Cleveland at times, despite being within driving distance, or flights from Milwaukee, which is a much smaller airport, are almost always pricier than flights from Chicago). My experiences in Europe have been that it's a little expensive to get there in the first place, but pretty cheap and easy to get around from country to country once you're there.
I'm not sure how all that is determined, but I'm glad you've had the opportunity to enjoy your stay here!