Hi,
What on earth are you going to do in Hat Yai if you can afford the ferry from Kuah to Lipe! Especially since I don’t think there’s a direct flight between Langkawi and Hat Yai.
https://fr.wikipedia.org/wiki/A%C3%A9roport_international_de_LangkawiThis year, when I arrived in Bangkok, I’d bought an exit flight from Thailand just in case, but they didn’t even ask for it at check-in in Paris. I didn’t even use it!
My experience in January this year: I did Thailand / Langkawi and then back from Langkawi to Thailand, but via Tammalang Pier, Satun. (I don’t even know if that ferry route still exists, by the way), because I didn’t want to go via Koh Lipe for budget reasons and also based on my sightseeing plans.
The online MDA had just been introduced. You had to do it 3 days before arrival... I did it the morning of my departure to Malaysia—I’d forgotten! No problem at all.
When returning to Thailand at Tammalang Pier, I just had to fill out the paper immigration card. But the officer asked me, "Do you have a hotel?" and insisted I write the address of my hotel on the immigration card "in my own handwriting" because I’d forgotten to fill in that section, as if the most important thing was my address in Thailand!
He stamped my 30-day stay permit with the expiry date and didn’t ask when I was leaving Thailand or for any proof.
When arriving in Malaysia for the MDA, I wrote the name and address of a hotel for my address, but I didn’t have any reservation.
Don’t forget you now get a 60-day visa-free stay in Thailand. And in Malaysia, it’s 3 months visa-free. They’re really not strict in Malaysia—I never had any issues. You have a return flight from Bangkok, so I think that’s enough.
I’ll admit that figuring out how to get back to Thailand from Langkawi was a bit of a hassle because I didn’t want to go via Koh Lipe, and my usual ferry route from George Town had been canceled. What a pain to sort out! The agencies I asked for info in Cenang gave me all kinds of conflicting details, especially about schedules. But transfers to Koh Lipe? They sell those everywhere. If I were in your situation and my goal in Thailand was just to go to Koh Lipe, I’d take the ferry from Langkawi to Koh Lipe.