AA 3197 then AA 2074 at O'Hare
Omaha → Chicago → Boston
Timetable, Chicago time
10:00AA 3197 from Omaha at the gate
13:37AA 2074 to Boston leaves the gate
3 h 37 apart on the timetable
The last days
AA 3197 and AA 2074 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.