UA 4598 then DL 2816 at O'Hare
Asheville → Chicago → Boston
Timetable, Chicago time
07:56UA 4598 from Asheville at the gate
15:05DL 2816 to Boston leaves the gate
7 h 09 apart on the timetable
The last days
UA 4598 and DL 2816 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.