DL 1113 then AA 9949 at Detroit
Denver → Detroit → Pittsburgh
Timetable, Detroit time
15:19DL 1113 from Denver at the gate
19:20AA 9949 to Pittsburgh leaves the gate
4 h 01 apart on the timetable
The last days
DL 1113 and AA 9949 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.