LX 8 then UA 5539 at O'Hare
Zurich → Chicago → Cleveland
Timetable, Chicago time
16:15LX 8 from Zurich at the gate
10:50UA 5539 to Cleveland leaves the gate
18 h 35 apart on the timetable, overnight
UA 5539 leaves 18 h 35 after LX 8 arrives on the timetable: more than half a day, so not a connection we count.