Among other key findings, the study reveals that 22% of all global air travel is concentrated on just 300 origin and destination ‘super routes’, each of which carries over 1 million passengers annually. Furthermore, 69% of all global air travel is made on major routes with 100 thousand annual passengers...So, where are those "super routes"? VizualStatistix has plotted the top ten on a map, which I've placed below the fold to challenge you to name any one of those top ten routes before peeking (i.e. name the cities the planes fly between).
"Note that the lines are not geodesics; I curved path #7 so that you could see path #6 beneath it."