- A visa is not required if You stay in Singapore is less than 96 hours (4 days). For example, You fly from Germany to Indonesia via Singapore. The airport is usually asked to show tickets (and a visa, if required) in the country of final arrival. Of course, instead of Germany and Indonesia could be any other country.
- A visa is required if You fly «your country»-Singapore-«your country», that is, back home from Singapore (and do not fly somewhere further), even if You stay on the island will take only a few hours.
- A visa is required if You fly Germany, Singapore, and then take a ferry to Bintan Island (Indonesia), because in this case You do not get a transit rule that Singapore must leave by air.