AA 316 then UA 216 at DFW
Cancún → Dallas-Fort Worth → San Francisco
Timetable, Dallas-Fort Worth time
09:13AA 316 from Cancún at the gate
09:00UA 216 to San Francisco leaves the gate
23 h 47 apart on the timetable, overnight
UA 216 leaves 23 h 47 after AA 316 arrives on the timetable: more than half a day, so not a connection we count.