AA 3436 then AA 774 at O'Hare
Rochester (ROC) → Chicago → New York LaGuardia
Timetable, Chicago time
16:39AA 3436 from Rochester (ROC) at the gate
18:29AA 774 to New York LaGuardia leaves the gate
1 h 50 apart on the timetable
The last days
AA 3436 and AA 774 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.