A3 712 then FR 3792 at Barcelona
Athens → Barcelona → Birmingham (UK)
Timetable, Barcelona time
18:45A3 712 from Athens at the gate
12:00FR 3792 to Birmingham (UK) leaves the gate
17 h 15 apart on the timetable, overnight
FR 3792 leaves 17 h 15 after A3 712 arrives on the timetable: more than half a day, so not a connection we count.