AA 317 then G7 3376 at O'Hare
Denver → Chicago → St Louis
Timetable, Chicago time
10:04AA 317 from Denver at the gate
11:00G7 3376 to St Louis leaves the gate
56 min apart on the timetable
The last days
AA 317 and G7 3376 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.