FR 4083 then LA 5768 at Barcelona
Warsaw Modlin → Barcelona → Santander
Timetable, Barcelona time
19:10FR 4083 from Warsaw Modlin at the gate
11:00LA 5768 to Santander leaves the gate
15 h 50 apart on the timetable, overnight
LA 5768 leaves 15 h 50 after FR 4083 arrives on the timetable: more than half a day, so not a connection we count.