What are current quarantine policies for travelers coming from or travelling trough - Thailand (origin) - Japan (connecting flight Person A, not leaving airport) - Philippines (connecting flight Person B, not leaving airport) entering San Fran?

We had a Bichon freise for 13 years First get clearance from home country SFO Yes airline will guide when you book tickets from wherever you are traveling from..

Coming from Thailand and passing through Philippines and/or Japan?

I would check with the airline for each flight

Better consult with concern office. I had permission for both countries. Canada and America