IB 138 then AA 37 at Madrid
Quito → Madrid → Dallas-Fort Worth
Timetable, Madrid time
11:40IB 138 from Quito at the gatealso BA 4205, LA 5426, QR 6532, CZ 7333
10:00AA 37 to Dallas-Fort Worth leaves the gatealso BA 1513, AY 3743, IB 4608
22 h 20 apart on the timetable, overnight
AA 37 leaves 22 h 20 after IB 138 arrives on the timetable: more than half a day, so not a connection we count.