FR 1799 then SN 3820 at Lisbon
Toulouse → Lisbon → Brussels
Timetable, Lisbon time
23:55FR 1799 from Toulouse at the gate
18:40SN 3820 to Brussels leaves the gate
18 h 45 apart on the timetable, overnight
SN 3820 leaves 18 h 45 after FR 1799 arrives on the timetable: more than half a day, so not a connection we count.