FR 4546 then IB 5410 at Barcelona
Porto → Barcelona → London Gatwick
Timetable, Barcelona time
20:40FR 4546 from Porto at the gate
13:55IB 5410 to London Gatwick leaves the gatealso LL 5410, VY 7614
17 h 15 apart on the timetable, overnight
IB 5410 leaves 17 h 15 after FR 4546 arrives on the timetable: more than half a day, so not a connection we count.