AA 3709 then AA 2487 at DFW
Tampico → Dallas-Fort Worth → St Louis
Timetable, Dallas-Fort Worth time
18:06AA 3709 from Tampico at the gate
18:00AA 2487 to St Louis leaves the gate
23 h 54 apart on the timetable, overnight
AA 2487 leaves 23 h 54 after AA 3709 arrives on the timetable: more than half a day, so not a connection we count.