Is there a 3 month Visa that Thailand is currently giving out?
Not that i know of, The Tourist Visa is 60 days, which you can extend an additional 30. (but its still a 60 day visa).
As for your flight you have booked, i would consider it a flight that will most likely be cancelled, as all the flights that were scheduled to Phuket have been cancelled. Also a regular tourist visa cannot be extended past the 90 days without changing your visa type, or exiting the country. Currently people are on a 'Covid' visa extension after their tourist visa's ran out.
quarantine will not be over in November thats a guarantee. and why would you pay for a visa now (if you intend to stay longer then visa exempt) and waste the Embassy's time by doing the application now for travel in oct/nov. as
pointed out, Visas are normally valid for 90 days from issuance (ie. you have to enter Thailand in that 90 days, then your stay starts when you enter).
Don't waste time and apply for your visa, in September.
And by then there may actually be flights into Phuket, as currently there are none, and only ASQ is available in Bangkok and surrounding areas. IE. Pattaya
It’ll depend on what flights are listed on your COE! Is your internal flight listed? But most likely yes since the flight to sing would be listed on your COE.
As Michael said you will most likely have to get your 30 day extension first. But depending on where you are located they may give you the 60 day unable to travel due to covid extension first.
I know I’m bangkok they are not giving them unless you’ve already done your 30 day extension
sorry i misread your post. Do you already have your STV (Visa) or you're applying for it still? if you don't have your Visa there is no point in starting the COE process. Wait until you have your visa as you need to upload a picture of it in part 1 of the COE process.