WN 2104 then UA 412 at San Francisco
Denver → San Francisco → Mexico City
Timetable, San Francisco time
10:30WN 2104 from Denver at the gate
22:48UA 412 to Mexico City leaves the gatealso AC 5025
12 h 18 apart on the timetable
UA 412 leaves 12 h 18 after WN 2104 arrives on the timetable: more than half a day, so not a connection we count.