WN 4187 then WN 2423 at Phoenix
St Louis → Phoenix → Dallas
Timetable, Phoenix time
12:00WN 4187 from St Louis at the gate
05:40WN 2423 to Dallas leaves the gate
17 h 40 apart on the timetable, overnight
WN 2423 leaves 17 h 40 after WN 4187 arrives on the timetable: more than half a day, so not a connection we count.