WN 642 then UA 1271 at San Francisco
Burbank → San Francisco → Mexico City
Timetable, San Francisco time
11:05WN 642 from Burbank at the gate
10:45UA 1271 to Mexico City leaves the gatealso AC 3479, NZ 9821
23 h 40 apart on the timetable, overnight
UA 1271 leaves 23 h 40 after WN 642 arrives on the timetable: more than half a day, so not a connection we count.