UA 367 then AM 665 at San Francisco
Washington → San Francisco → Mexico City
Timetable, San Francisco time
01:29UA 367 from Washington at the gatealso LH 7530, VA 8388, NZ 9181
22:23AM 665 to Mexico City leaves the gatealso WS 5776, WS 6160, DL 8039, SK 9503
20 h 54 apart on the timetable
AM 665 leaves 20 h 54 after UA 367 arrives on the timetable: more than half a day, so not a connection we count.