F9 3990 then DL 565 at Detroit
Dallas-Fort Worth → Detroit → Seattle
Timetable, Detroit time
21:43F9 3990 from Dallas-Fort Worth at the gate
19:57DL 565 to Seattle leaves the gate
22 h 14 apart on the timetable, overnight
DL 565 leaves 22 h 14 after F9 3990 arrives on the timetable: more than half a day, so not a connection we count.