UA 5209 then AA 9949 at Detroit
Chicago O'Hare → Detroit → Pittsburgh
Timetable, Detroit time
12:23UA 5209 from Chicago O'Hare at the gate
19:20AA 9949 to Pittsburgh leaves the gate
6 h 57 apart on the timetable
The last days
UA 5209 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.