Can you transit through Bangkok to Phuket or do you need a direct flight?

In the entire history of the phuket Sandbox since 1 July 2021 until the foreseeable future you have never been able to land in Bangkok and participate in the phuket Sandbox.

To participate in phuket Sandbox you must land in phuket, not anywhere else in Thailand, including not in Bangkok. What you do outside Thailand is not important. It's important what you do in Thailand and that's land in phuket and only in phuket.

Notice that it's possible to explain this without once using the word direct.

You can do Singapore to Phuket 👍

No

No

No.

Nope you can’t transit through bkk to Phuket, so would be 7 days (possibly 5 soon) ASQ in Bangkok before you can go anywhere , better to fly direct to Phuket as at least once you get the neg PCR after arrival you can go outside

You cannot transit through Bangkok.

Cannot transit to Phuket in BKK

Have you already got the Thailand Pass?