IB 421 then FR 4545 at Barcelona
Madrid → Barcelona → Porto
Timetable, Barcelona time
19:15IB 421 from Madrid at the gatealso IB 421S, LL 3021, VY 5122, AV 6170, QR 6971
17:15FR 4545 to Porto leaves the gate
22 h apart on the timetable, overnight
FR 4545 leaves 22 h after IB 421 arrives on the timetable: more than half a day, so not a connection we count.