There’s no bundling or fisheye-ing of routes, and it’s difficult to make sense of individual routes in the jumble of spaghetti, but even this “all” view shows useful patterns – you can see hubs, branching points, gaps.

Interactive version via Tableau at:

https://public.tableau.com/views/flightroutesoftheworld/Dashboard1?:embed=y&:display_count=yes:showVizHome=no

Found via /r/dataisbeautiful

https://www.reddit.com/r/dataisbeautiful/comments/739oui/flight_routes_of_the_world/