DL 2123 then AA 1260 at Boston
Savannah → Boston → Chicago O'Hare
Timetable, Boston time
14:15DL 2123 from Savannah at the gate
16:41AA 1260 to Chicago O'Hare leaves the gate
2 h 26 apart on the timetable
The last days
DL 2123 and AA 1260 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.