DL 5271 then UA 5451 at Detroit
Lansing → Detroit → Chicago O'Hare
Timetable, Detroit time
06:12DL 5271 from Lansing at the gate
18:21UA 5451 to Chicago O'Hare leaves the gate
12 h 09 apart on the timetable
UA 5451 leaves 12 h 09 after DL 5271 arrives on the timetable: more than half a day, so not a connection we count.