DL 9941 then UA 343 at Atlanta
Queretaro → Atlanta → San Francisco
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
17:35UA 343 to San Francisco leaves the gate
21 h 52 apart on the timetable, overnight
UA 343 leaves 21 h 52 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.