UA 1977 then DL 1029 at Boston
Houston → Boston → Detroit
Timetable, Boston time
12:25UA 1977 from Houston at the gate
21:28DL 1029 to Detroit leaves the gate
9 h 03 apart on the timetable
The last days
UA 1977 and DL 1029 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.
Later flights to Detroit
DL 996421:309 h 05 after UA 1977 on the timetable