ahhhh ok. Then if you want a hassle free way of re-entering the country I strongly suggest use land as much less hassles. Why not give my suggestion a quick message and they will say its ok or not and give you a price. I think you will pay ฿4000too.
why didn't you tell me earlier. i HAD one too but if you still have then a fly out/in is no problem.
if you hold a Non-Immigrant Visa "B" (for business and work) and plan to leave and re-enter Thailand, you must obtain a re-entry permit before leaving the country, otherwise your visa will be voided.
Here's a more detailed explanation:
Why you need a re-entry permit: If you have a Non-Immigrant Visa "B" and leave Thailand without a re-entry permit, your visa will become invalid, and you won't be able to re-enter Thailand on that visa.
Where to apply: You can apply for a re-entry permit at any immigration office in Thailand.
Types of re-entry permits: You can apply for a single or multiple re-entry permit.
Cost: The cost for a single re-entry permit is 1,700 THB and 3,800 THB for a multiple entry permit.
Important note: A re-entry permit is valid for the duration of your visa, meaning it doesn't reset your stay days every time you re-enter.
airports are hard on people now so don't take my advice but
1. Have ฿20k in cash
Have your address in Thailand and
A proof of onward travel .
Expect to be questioned and maybe denied entry to Thailand if your past history of entries warrants the IO to pull you aside. Always maintain you are a tourist and haven't seen all of the country yet.