Perhaps most of it is cargo? (UPS, FedEx, DHL, etc...) Cargo is still flying last I recall? That is still a lot of aircraft.
And no ban on domestic flights that I know of, frankly I think that is spreading it around as bad as international at this point.
I had to take a family member to the doctor today, thankfully it seems unrelated to the pandemic. I didn't set foot outside the truck. I was surprised at how many folks were out and about like nothing is going on....