How does the "test and go" system work with a connecting flight through BKK and onto another destination in Thailand? Does one test and go in BKK or at the final destination (I'm assuming it's in BKK)? I'm looking at booking a flight from SGN to Ko Samui in late July for my family of 4 and there are no direct flighs, but I do see connecting flights through BKK with connecting times ranging from a couple of hours to overnight. I know that things are changing, but I'm just wondering what anyone here would advise on what sort of ticket I should purchase (i.e. how many hours/days to connect). As I am travelling with children the easiest would be not to stay overnight in BKK but to connect on the same day.