FR 4083 then LA 5752 at Barcelona
Warsaw Modlin → Barcelona → Bilbao
Timetable, Barcelona time
18:35FR 4083 from Warsaw Modlin at the gate
12:35LA 5752 to Bilbao leaves the gate
18 h apart on the timetable, overnight
LA 5752 leaves 18 h after FR 4083 arrives on the timetable: more than half a day, so not a connection we count.