DL 2816 then 7L 4871 at O'Hare
Boston → Chicago → Houston
Timetable, Chicago time
14:05DL 2816 from Boston at the gate
20:307L 4871 to Houston leaves the gate
6 h 25 apart on the timetable
The last days
DL 2816 and 7L 4871 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.