I visited thailand 3 times this year . 1st time for a few days via land crossing Hatyai-Malaysia border. 2nd and 3rd time via Flight from Kuala lumpur to DMK, 3rd time from Kuala lumpur to Utapao. When i traveled by plane, 2nd time i put roughly 18 days from my memory, and 28 days for the 3rd time. Both times they never asked me proof of 20k THB or equivalent, and never asked me proof of onward tickets. (Both times i flew in on a one way ticket) I plan on going again in October, but this time i indefinitely want to do 30days. What are the chances for them to ask for onward ticket this time?
Close to mid 20s American citizen
This is based on the 30days Visa exempt visa