UA 5484 then CA 8414 at O'Hare
Tucson → Chicago → Shanghai
Timetable, Chicago time
17:05UA 5484 from Tucson at the gate
05:40CA 8414 to Shanghai leaves the gate
12 h 35 apart on the timetable, overnight
CA 8414 leaves 12 h 35 after UA 5484 arrives on the timetable: more than half a day, so not a connection we count.