AA 3704 then 1I 511 at O'Hare
La Crosse → Chicago → St Louis
Timetable, Chicago time
07:30AA 3704 from La Crosse at the gate
11:001I 511 to St Louis leaves the gate
3 h 30 apart on the timetable
Today
From the airport’s board at 15:21 Chicago time
06:57AA 3704 reached the gate33 min early
11:241I 511 left the gate24 min late
4 h 27 between the gates
The last days
AA 3704 and 1I 511 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.