DL 3847 then DL 1135 at Detroit
Buffalo → Detroit → Phoenix
Timetable, Detroit time
17:16DL 3847 from Buffalo at the gate
17:15DL 1135 to Phoenix leaves the gate
23 h 59 apart on the timetable, overnight
DL 1135 leaves 23 h 59 after DL 3847 arrives on the timetable: more than half a day, so not a connection we count.