AA 4104 then UA 1780 at DFW
Memphis → Dallas-Fort Worth → San Francisco
Timetable, Dallas-Fort Worth time
11:27AA 4104 from Memphis at the gate
15:16UA 1780 to San Francisco leaves the gate
3 h 49 apart on the timetable
The last days
AA 4104 and UA 1780 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.