U2 7643 then LX 326 at Zurich
Lisbon → Zurich → London Heathrow
Timetable, Zurich time
20:30U2 7643 from Lisbon at the gate
17:00LX 326 to London Heathrow leaves the gate
20 h 30 apart on the timetable, overnight
LX 326 leaves 20 h 30 after U2 7643 arrives on the timetable: more than half a day, so not a connection we count.