Originally Posted by
caspritz78
...In a country without an outbound border control like the USA for example you exited the country according to visa regulations when you return your I-94. It shouldn't be possible to return into the United States without going again through immigration.
The law allows either; regulation (procedure) strongly prefers what you describe -- but it is not required by law. Under some conditions (mainly based on circumstance) re-entry is allowed withoug going through immigration. Otherwise your descriptions are spot on.
So, one should expect to be delayed by immigration (and customs) when diverted domestically; but it is not a given. Most countries work the same way as the US.