WN 1648 then DL 514 at Boston
Kansas City → Boston → Phoenix
Timetable, Boston time
12:25WN 1648 from Kansas City at the gate
08:35DL 514 to Phoenix leaves the gate
20 h 10 apart on the timetable, overnight
DL 514 leaves 20 h 10 after WN 1648 arrives on the timetable: more than half a day, so not a connection we count.