F9 685 then WN 1037 at Denver
Washington National → Denver → Phoenix Sky Harbor
Timetable, Denver time
09:16F9 685 from Washington National at the gate
06:00WN 1037 to Phoenix Sky Harbor leaves the gate
20 h 44 apart on the timetable, overnight
WN 1037 leaves 20 h 44 after F9 685 arrives on the timetable: more than half a day, so not a connection we count.