DL 5703 then DL 2680 at Boston
Baltimore → Boston → Chicago O'Hare
Timetable, Boston time
10:41DL 5703 from Baltimore at the gate
13:40DL 2680 to Chicago O'Hare leaves the gate
2 h 59 apart on the timetable
The last days
DL 5703 and DL 2680 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.