UA 3 then LX 2140 at Zurich
Chicago → Zurich → Valencia
Timetable, Zurich time
07:55UA 3 from Chicago at the gate
07:00LX 2140 to Valencia leaves the gate
23 h 05 apart on the timetable, overnight
LX 2140 leaves 23 h 05 after UA 3 arrives on the timetable: more than half a day, so not a connection we count.