LA 5798 then IB 5414 at Barcelona
Lisbon → Barcelona → London Gatwick
Timetable, Barcelona time
23:55LA 5798 from Lisbon at the gate
15:20IB 5414 to London Gatwick leaves the gatealso LL 5414, VY 7618
15 h 25 apart on the timetable, overnight
IB 5414 leaves 15 h 25 after LA 5798 arrives on the timetable: more than half a day, so not a connection we count.