IB 5401 then IB 2470 at Barcelona
London Gatwick → Barcelona → Leon
Timetable, Barcelona time
13:15IB 5401 from London Gatwick at the gatealso LL 5401, VY 7605, BA 8059
09:10IB 2470 to Leon leaves the gatealso LL 3100, VY 5870, QR 8047
19 h 55 apart on the timetable, overnight
IB 2470 leaves 19 h 55 after IB 5401 arrives on the timetable: more than half a day, so not a connection we count.