DL 514 then AA 623 at Phoenix
Boston → Phoenix → Kansas City
Timetable, Phoenix time
21:53DL 514 from Boston at the gate
19:10AA 623 to Kansas City leaves the gate
21 h 17 apart on the timetable, overnight
AA 623 leaves 21 h 17 after DL 514 arrives on the timetable: more than half a day, so not a connection we count.