one of my favorite sites, the great circle mapper, has a wonderful blog series of featured maps (well worth perusing if you’re even remotely interested in aviation).
the latest follows a single united airlines 777 for a roughly two-week period (the green shows the next destinations as of the time the original post).
i know that it’s really rare that a plane flies just back and forth between two cities, but to see its globetrotting plotted out on a map is pretty damn amazing. just think: according to wikipedia, united alone has 55 of these (33 pre-merger).
Map generated by the Great Circle Mapper – copyright © Karl L. Swartz.