BA 504 then AC 813 at Lisbon
London Heathrow → Lisbon → Montréal
Timetable, Lisbon time
12:05BA 504 from London Heathrow at the gate
11:20AC 813 to Montréal leaves the gate
23 h 15 apart on the timetable, overnight
AC 813 leaves 23 h 15 after BA 504 arrives on the timetable: more than half a day, so not a connection we count.