FR 7807 then FR 3035 at Barcelona
London Luton → Barcelona → Krakow
Timetable, Barcelona time
17:45FR 7807 from London Luton at the gate
11:05FR 3035 to Krakow leaves the gate
17 h 20 apart on the timetable, overnight
FR 3035 leaves 17 h 20 after FR 7807 arrives on the timetable: more than half a day, so not a connection we count.