AA 540 then DL 2816 at O'Hare
Nashville → Chicago → Boston
Timetable, Chicago time
11:05AA 540 from Nashville at the gate
15:05DL 2816 to Boston leaves the gate
4 h apart on the timetable
Today
From the airport’s board at 17:03 Chicago time
11:01AA 540 reached the gate4 min early
15:02DL 2816 left the gate3 min early
4 h 01 between the gates
The last days
AA 540 and DL 2816 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.