UA 503 then DL 756 at O'Hare
Boston → Chicago → Los Angeles
Timetable, Chicago time
12:29UA 503 from Boston at the gate
14:32DL 756 to Los Angeles leaves the gate
2 h 03 apart on the timetable
Today
From the airport’s board at 16:41 Chicago time
11:52UA 503 reached the gate37 min early
15:59DL 756 left the gate1 h 27 late
4 h 07 between the gates
The last days
UA 503 and DL 756 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.