DL 499 then WN 1037 at Denver
Boston → Denver → Phoenix Sky Harbor
Timetable, Denver time
10:26DL 499 from Boston at the gate
06:00WN 1037 to Phoenix Sky Harbor leaves the gate
19 h 34 apart on the timetable, overnight
WN 1037 leaves 19 h 34 after DL 499 arrives on the timetable: more than half a day, so not a connection we count.