Originally Posted by
cos999
.... Is this a new rule that connection times have to be < 4 hrs or it's ruled a stopover?
That has always been the rule for domestic only flights.
One exception is if there is no earlier flight. Another exception if this is part of an international itin.
As for SDC, strictly speaking, SDC needs to be within the routing/fares rules, so the agent is correct, However, at times, folks have been successful getting around the 4-hour stopover.