DL 5031 then DL 5138 at Detroit
Toronto → Detroit → Knoxville
Timetable, Detroit time
07:43DL 5031 from Toronto at the gate
19:49DL 5138 to Knoxville leaves the gate
12 h 06 apart on the timetable
DL 5138 leaves 12 h 06 after DL 5031 arrives on the timetable: more than half a day, so not a connection we count.