UA 4500 then AV 583 at Dulles
Detroit → Washington → Santa Clara
Timetable, Washington time
21:17UA 4500 from Detroit at the gate
16:25AV 583 to Santa Clara leaves the gate
19 h 08 apart on the timetable, overnight
AV 583 leaves 19 h 08 after UA 4500 arrives on the timetable: more than half a day, so not a connection we count.