AA 3412 then B6 8412 at O'Hare
Mosinee → Chicago → Boston
Timetable, Chicago time
13:00AA 3412 from Mosinee at the gate
16:00B6 8412 to Boston leaves the gate
3 h apart on the timetable
The last days
AA 3412 and B6 8412 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.