AA 2748 then AA 660 at DFW
Seattle → Dallas-Fort Worth → Detroit
Timetable, Dallas-Fort Worth time
10:59AA 2748 from Seattle at the gate
14:57AA 660 to Detroit leaves the gate
3 h 58 apart on the timetable
The last days
AA 2748 and AA 660 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.