Can I fly out of Thailand and back in the same day to obtain a new 30-day tourist visa?

KL is a lousy place.

Extended ours by 7 days only 2 weeks ago. Fee is 1900 baht.

KL is fantastic. Well, I like it !

@Sop***

Why not? I am going there in August for my Thai visa trip. I want to like KL!

Yes it does. But you burn less fossil fuel and less of your own time.

It's because I'm from another planet.

@Mag***

I'm not sure why people get so hung up on Thai immigration using the word "alien". Here are two dictionary definitions that should make it clear that it's a perfectly appropriate term: "belonging to a foreign country or nation." & "a foreigner, especially one who is not a naturalized citizen of the country where they are living.".

You're regarding the overstay though:

These rules apply to the Alien giving himself up at immigration and are as follows :

Overstay more than 90 Days – 1 year ban from Thailand

Overstay more than 1 Year – 3 year ban from Thailand

Overstay more than 3 Years – 5 year ban from Thailand

Overstay more than 5 Years – 10 year ban from Thailand

Arrested & Found To Be On Overstay- Apprehended !

Overstay less than 1 Year – 5 year ban from Thailand

Overstay more than 1 Year – 10 year ban from Thailand

Although that's for aliens, it doesn't say what the rule is for human beings.

Yeah apparently if the police catch you in those four days it's a five year ban!!!

No more days after the 7 days,then you have to leave country

Why no more 1,900 ?

It is never a good idea to overstay your visa and get a stamp in your passport.

Yup.