AA 4757 then UA 1314 at O'Hare
Pittsburgh → Chicago → Washington National
Timetable, Chicago time
13:59AA 4757 from Pittsburgh at the gate
14:03UA 1314 to Washington National leaves the gate
4 min apart on the timetable
The last days
AA 4757 and UA 1314 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.