AA 37 then AA 3378 at DFW
Madrid → Dallas-Fort Worth → Fargo
Timetable, Dallas-Fort Worth time
17:35AA 37 from Madrid at the gate
14:30AA 3378 to Fargo leaves the gate
20 h 55 apart on the timetable, overnight
AA 3378 leaves 20 h 55 after AA 37 arrives on the timetable: more than half a day, so not a connection we count.