Google seems to be testing a new feature that shows the travel trends in a specific city. Google is showing the percentage of flights operating in that area and the percentage of hotels with availability. I am not sure if this is a COVID-19 feature or just a generic Google Travel feature.
Here is a screen shot from Ramesh Singh that he posted on Twitter - note, I cannot replicate this:
Ramesh said Google is "showing COVID travel trends." Again, it might be specific to COVID or it might just be a travel feature Google had for some time. But the percentage of flights operating does seem specific to COVID.
Forum discussion at Twitter.
Update: A few weeks later, Google announced this:
Although travel restrictions are starting to lift in some countries, the uncertainty of COVID-19 makes it hard to plan travel with confidence. Learn about our new features to help you make informed decisions and travel safely when the time comes ↓ https://t.co/ONmm4bF1gV
— Google (@Google) August 13, 2020
