@Linkat,
Yes. I have taken two international trips (to Mexico) since Covid. I will be making a third around Christmas.
The domestic legs of my trips have been pretty sparse. I have generally had a row to myself (which feels weird).
The airports are not empty, but not very crowded. A lot of businesses and restaurants are closed or have limited menus. I am gluten free... it has been more difficult for me to find food I can eat. The security lines have been much quicker than normal.
The international leg of my trips, the planes have been full. People and employees have been patient and understanding. Everyone wears a mask. Most people I have encountered are on their best behavior.
Coming back, I have been put on house arrest (which I respect and adhere to). I have found that I am able to get Covid Test results in 2 days... which generally means I can get a negative test after 5 days locked in my house. The first time I came back, I didn't no how to do this... and the wait was difficult.