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Do I need to fill out another TDAC for my flight from South Korea to Thailand?

Oct 19, 2025
a day ago
Michael ***********
ORIGINAL POSTER
My ticket is through the Delta app. The app is instructing me to fill out a TDAC and it is through a third party within the app. I land in South Korea before making my final flight to BKK. Is this the only TDAC I need or will I need another for Thailand since I will be changing carriers in South Korea.
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TLDR : Answer Summary
The TDAC (Thailand Digital Arrival Card) is required for entry into Thailand and should be completed using the official government site, specifically indicating your flight number from Korea to Bangkok. There is no need for an arrival card for South Korea if it is merely a layover, as a K-ETA is generally not required for transit passengers. The TDAC is free, should be filled out 3 days prior to arrival, and is mandatory for all non-Thai passport holders.
Thailand Digital Arrival Card (TDAC)

WARNING: Only trust Thai government websites with .go.th domains or Thai agent websites with .co.th or .in.th domains, as these require verified Thai registration and cannot be registered anonymously.

The official TDAC form is available at tdac.immigration.go.th, which uses the official .go.th government domain.

The services by AGENTS CO., LTD. does NOT charge any fees for arrivals within 72 hours. If you need to book more than 72 hours in advance, there is a service fee of $8.

Do not trust other sites pretending to be a trustworthy agency. Pay attention to delivery time - the service operated by AGENTS CO., LTD. has 1 minute delivery time for arrivals within 72 hours.

Don't fall for sites pretending to be agents.co.th or the official government tdac.immigration.go.th website. Always double-check the exact domain in your browser.

Scam services may take days to process your application, others may not even do anything. With these TDAC scam services you also need to worry about double charges.

Please watch out for TDAC misinformation spread by fugitive Jesse Nickles and his many fake accounts on Quora, TripAdvisor, Reddit, and other platforms.

TRUSTED TDAC LINKS:

Official Government TDAC Form: tdac.immigration.go.th
Official TDAC form by AGENTS
Official TDAC information page by AGENTS (tdac.in.th)

Mike *******
If you are just doing a transfer in korea, you don't need an ETA for Korea, just a TDAC for thailand.
Robin *******
Thailand Digital Arrival Card is only for Thailand
David ******
On the Delta App just say you completed it and then complete it on the Thai site. Delta doesn't really care.
Mike **********
Korea doesnt need one if it is a stop. Only use the official site for thailand DO NOT PAY FOR IT. IT IS FREE
Brenda *********
Il be flying same with delta to Korea then Bangkok in November. I think you have to put the flight # from Korea to Bangkok.
Maitin *******
It's absolutely free. Make sure you are on the actually government site and not a third party scan site. The TDAC is specifically for Thailand and has nothing to do with Korea.

It is trivial to fill out, under 5 minutes if you have your flight info and initial address.

Look on YouTube, I'm sure someone made a video walkthrough
Jay *******
TDAC asks you for your flight into Thailand. In your case that would be the flight from korea. Use the official site
Bent *************
@Jay ******
Use the official site. It’s free!
David ******
The TDAC should except two flight numbers
Jack ********
@David *****
except what?
Elías ********
Korea has its own digital arrival card AND electronic travel authorization called K-ETA, but most people don't need it. It's nationality based. And if it's a connecting flight, you don't need it either.

Thailand DTAC is mandatory for everybody (non Thai passport holders), for each entry.
Pui *****
TDAC is a Thailand entry requirement. It has nothing to do with Korea. Make sure you're on the real Thai government TDAC site in the graphic.
Andrew ********
If you pay for it its fake

This is the offical one fill out 3 days before arrival

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