AA 4783 then UA 3484 at O'Hare
Baltimore → Chicago → Pittsburgh
Timetable, Chicago time
12:59AA 4783 from Baltimore at the gate
15:45UA 3484 to Pittsburgh leaves the gate
2 h 46 apart on the timetable
The last days
AA 4783 and UA 3484 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.