OO 6058 then UA 321 at O'Hare
Sioux City → Chicago → Phoenix
Timetable, Chicago time
09:24OO 6058 from Sioux City at the gate
09:15UA 321 to Phoenix leaves the gate
23 h 51 apart on the timetable, overnight
UA 321 leaves 23 h 51 after OO 6058 arrives on the timetable: more than half a day, so not a connection we count.