FR24 seems to show that yesterday (Monday 23 March), the number of flights they tracked globally was down about 45% compared to Monday 9 March.
Of the flights operating in Europe in the last 5 mins, a non-trivial proportion seem to be dedicated to either cargo or general aviation. There are other flights (e.g. London-Tenerife) for which fares in the next few days are very cheap if you want to head south, but more expensive if you want to head north - most likely repatriating the last stragglers from the beach. The number of traditional commercial pax flights in Europe however seems to be well below what one might have seen a month ago. I grant that it is perhaps surprising how many pax flights are being operated in Europe by Wizzair right now