AA 1934 then CX 7578 at San Francisco
Miami → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
10:29AA 1934 from Miami at the gate
11:20CX 7578 to Dallas-Fort Worth leaves the gate
51 min apart on the timetable
The last days
AA 1934 and CX 7578 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.