AS 315 then DL 3965 at Detroit
Seattle → Detroit → Traverse City
Timetable, Detroit time
05:40AS 315 from Seattle at the gate
16:00DL 3965 to Traverse City leaves the gate
10 h 20 apart on the timetable
The last days
AS 315 and DL 3965 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.