Hello,
I came in Thailand on December 2021 and thanks to the Covid extension, I stayed 9 months.
Then, I left Thailand in October 2022.
When I came back four months later - without visa, visa extension was still 45 days - immigration at Suvarnabhumi saw I stayed nine months and make me problems. At the end, they let me in but they checked if I had a departure ticket - I had - and a rental address in Bangkok - I had too.
What is your experience with Chiang Mai international airport ?
Thank you.