AM 668 then CX 7578 at San Francisco
Mexico City → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
11:38AM 668 from Mexico City at the gatealso WS 6113, DL 8009
11:20CX 7578 to Dallas-Fort Worth leaves the gate
23 h 42 apart on the timetable, overnight
CX 7578 leaves 23 h 42 after AM 668 arrives on the timetable: more than half a day, so not a connection we count.