Plotting the flight paths of airplane traffic seems to be a new branch of data visualisation on its own. The most recent video doing the rounds is this one:
And here are couple from the vault.
Contrails maps the complete path that the plane has taken.
Planefinder is a real time map of planes currently in the air.
Both are powered using planefinder.net’s database, which it seems is powered by an army of aviation enthusiasts who like tracking airplanes.