To get the tourist visa, I understand you need an onward flight. Would it be noticed if the onward flight was actually a round trip ticket that ends back in Thailand?
TLDR : Answer Summary
To obtain a tourist visa for Thailand, you typically need to show proof of onward travel. While it's clear that a round-trip ticket returning to Thailand may fulfill this requirement technically, there are mixed opinions on whether this would be noticed or cause issues at check-in or visa application. Some users suggest that it is safer to have a legitimate onward ticket to another destination or even a cheap bus ticket just outside Thailand. Others have successfully obtained visas with one-way tickets or dummy tickets, implying that the key issue is simply demonstrating that you have plans to leave Thailand.