IB 668 then AA 37 at Madrid
Milan Linate → Madrid → Dallas-Fort Worth
Timetable, Madrid time
10:20IB 668 from Milan Linate at the gatealso VY 5121, AA 8540
10:00AA 37 to Dallas-Fort Worth leaves the gatealso BA 1513, AY 3743, IB 4608
23 h 40 apart on the timetable, overnight
AA 37 leaves 23 h 40 after IB 668 arrives on the timetable: more than half a day, so not a connection we count.