UA 6123 then DL 3889 at Detroit
Houston → Detroit → Omaha
Timetable, Detroit time
16:04UA 6123 from Houston at the gate
16:00DL 3889 to Omaha leaves the gate
23 h 56 apart on the timetable, overnight
DL 3889 leaves 23 h 56 after UA 6123 arrives on the timetable: more than half a day, so not a connection we count.