I'm not trying to do an extension or border bounce. My plan has always been to go from Bangkok over to Siem Reap and stay there for a month.
I have read several posts recently about the possibilty and/or need to provide 'proof of departure' out of Thailand, either to an air carrier heading towards Thailand or to the customs and immigration agents upon entry into the country.
There have been mentions of booking a 'real', cheap, one-way ticket out of the country or using the Onward Ticket app. One response mentioned that a bus doesn't count because it only takes you to the border. Since I am leaving the day after Christmas, cheap airfare wasn't an option.
Does my full-transit one-way Giant Ibis ticket from Bangkok to Siem Reap work as proof? I'm spending a month there in Cambodia before coming back to Bangkok for 6 weeks then on to Vietnam for three months.