AA 3709 then AA 2522 at DFW
Tampico → Dallas-Fort Worth → San Francisco
Timetable, Dallas-Fort Worth time
18:06AA 3709 from Tampico at the gate
21:10AA 2522 to San Francisco leaves the gate
3 h 04 apart on the timetable
The last days
AA 3709 and AA 2522 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.