IB 404 then AA 37 at Madrid
Barcelona → Madrid → Dallas-Fort Worth
Timetable, Madrid time
10:40IB 404 from Barcelona at the gatealso LA 1515, LL 3004, VY 5030, QR 5092, AV 6000, BA 7078, AA 8622
10:00AA 37 to Dallas-Fort Worth leaves the gatealso BA 1513, AY 3743, IB 4608
23 h 20 apart on the timetable, overnight
AA 37 leaves 23 h 20 after IB 404 arrives on the timetable: more than half a day, so not a connection we count.