Here is a very cool video published by the Wall Street Journal showing time-lapse of all air travel in the UK on a typical day based upon radar position data. It begins with a swarm of flights traveling from North America, and wraps with non-commercial air traffic (military, general aviation and helicopter travel out of Aberdeen).
It's definitely worth the 6 minutes.
http://www.msn.com/en-us/travel/news/time-lapse-of-flights-in-the-uk%E2%80%99s-busy-skies/vi-BBeHYwT
Cheers!