UA 5859 then OO 6045 at O'Hare
Flint → Chicago → Grand Rapids
Timetable, Chicago time
09:43UA 5859 from Flint at the gate
09:40OO 6045 to Grand Rapids leaves the gate
23 h 57 apart on the timetable, overnight
OO 6045 leaves 23 h 57 after UA 5859 arrives on the timetable: more than half a day, so not a connection we count.