AA 6451 then WN 1037 at Denver
Los Angeles → Denver → Phoenix Sky Harbor
Timetable, Denver time
11:21AA 6451 from Los Angeles at the gate
06:00WN 1037 to Phoenix Sky Harbor leaves the gate
18 h 39 apart on the timetable, overnight
WN 1037 leaves 18 h 39 after AA 6451 arrives on the timetable: more than half a day, so not a connection we count.