[user104658]

Originally Posted by Kizzy

That would have to be some laser, planes fly very high :/

Lasers aren't like torches, the light travels in a (more or less) straight line unlike a normal light source which spreads out. Therefore, they do have a very long range.

This has been a problem at airports ever since these laser pens became widely available. There no way to catch whoever did it unless someone witnesses them doing it and goes to the police - the beam could be coming from absolutely anywhere in a fairly wide radius. There's no way to trace exactly where it came from.