A long time ago there was a
post with a video of world air traffic in a day. In connection with
known events, it would be interesting to see how traffic changed during the day in the last week.
Here is a link to the state of airports in Europe, almost all are painted red, that is, there are no departures.
And here is the
Air Trafic Live service. It shows in real time the state of the sky all over the world.
According to RIA Novosti. in Europe since Thursday, about 60 thousand flights have been canceled.
Under the habrakta couple visual pictures

Here is the state of Europe at 11 pm Sunday, April 18:
yellow planes are departures, crosses - the airport is closed:

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PS If someone can repeat the creation of video traffic for the day would be grateful, my knowledge is not enough to do it.