UA 3 then U2 7644 at Zurich
Chicago → Zurich → Lisbon
Timetable, Zurich time
07:55UA 3 from Chicago at the gate
21:20U2 7644 to Lisbon leaves the gate
13 h 25 apart on the timetable
U2 7644 leaves 13 h 25 after UA 3 arrives on the timetable: more than half a day, so not a connection we count.