AA 3708 then WN 2423 at Phoenix
Denver → Phoenix → Dallas
Timetable, Phoenix time
08:33AA 3708 from Denver at the gate
05:40WN 2423 to Dallas leaves the gate
21 h 07 apart on the timetable, overnight
WN 2423 leaves 21 h 07 after AA 3708 arrives on the timetable: more than half a day, so not a connection we count.