UA 4500 then AV 585 at Dulles
Detroit → Washington → Santa Clara
Timetable, Washington time
21:17UA 4500 from Detroit at the gate
18:35AV 585 to Santa Clara leaves the gate
21 h 18 apart on the timetable, overnight
AV 585 leaves 21 h 18 after UA 4500 arrives on the timetable: more than half a day, so not a connection we count.