DL 8868 then B6 1012 at O'Hare
Tampa → Chicago → Boston
Timetable, Chicago time
14:54DL 8868 from Tampa at the gate
20:15B6 1012 to Boston leaves the gate
5 h 21 apart on the timetable
The last days
DL 8868 and B6 1012 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.