GPS Tracking all airplanes all the time everywhere in the world.

Flightradar24 is updating a world map every few seconds with the position and direction of all known aircraft aloft in the world.  Zoom on the world map to see your area.  You can check how far out your plane is while you wait.  The "About" page explains that Europe has almost 100% coverage and North America is increasing rapidly as more and more planes add the public GPS link.   Hat tip to smalldeadanimals.  Planes update by the second although some (in orange) have a 5 minute display delay.  Soon all planes will have this GPS satellite update as radar is replaced.

Here's the live display centred on Buffalo NY.
and two snapshots: