AA 2554 then WN 1722 at Phoenix
Chicago O'Hare → Phoenix → Las Vegas
Timetable, Phoenix time
20:57AA 2554 from Chicago O'Hare at the gate
18:20WN 1722 to Las Vegas leaves the gate
21 h 23 apart on the timetable, overnight
WN 1722 leaves 21 h 23 after AA 2554 arrives on the timetable: more than half a day, so not a connection we count.