What are the opening times for the office to get  re entry permit at Bangkok airport! Is it 24 hours ?

You can only get one on departure from the country.

It should still be available 24 hours a day or at least when flights are departing.

OP, after security check you obtain re-entry permit prior to passport control. 

 

15 hours ago, DrJack54 said:

OP, after security check you obtain re-entry permit prior to passport control. 

 

That is (i.e., was a year or so ago) variable according to which passport control you use.  The booth is also accessible from after passport control if necessary. 

In these uncertain times once you are sure that you are leaving just pop into your local 

& get one. Nothing worse than to be ready to board & the office at the airport is closed

10 minutes ago, natway09 said:

In these uncertain times once you are sure that you are leaving just pop into your local 

& get one. Nothing worse than to be ready to board & the office at the airport is closed 

Well I have been told it's always open . Where to get the actual info 

Both Suvanaramburi and Don Muang airports are both open 24 hours.

 

Here's a link:

 

https://www.expatden.com/thailand/thailand-re-entry-permit/#Suvarnabhumi_Airport

 

If you’re leaving Thailand from Suvarnabhumi Airport you might want to get there at least three hours before your flight, as the process could take you up to 45 minutes. The re-entry permit counter is located all the way your left in the immigration departure halls. It’s open 24-hours a day.

 

 

 

In current times you might need to alert immigration of you intentions. Most likely reentry permit/overstay office is unattended. They will be along 

10 minutes max

59 minutes ago, DrJack54 said:

In current times you might need to alert immigration of you intentions. Most likely reentry permit/overstay office is unattended. They will be along 

Where do you 'alert' them if it's before going through immigration?

8 hours ago, pixelaoffy said:

Where do you 'alert' them if it's before going through immigration?

I just meant any staff. Clerk etc. Like the ones that check if you have departure card etc

Why not apply for re-entry when getting your visa extension?

I'd certainly get it at the Immigration office. If I left it to get at the airport instead, I'd be terrified of missing the place where you do it and then you're screwed. 

On 5/13/2021 at 9:46 PM, Mayhem11 said:

Why not apply for re-entry when getting your visa extension?

Takes a lot longer and might never use it.

I got my re-entry permit today from the immigration office today, very quick and straight forward.