WN 452 then UA 2418 at Phoenix
Baltimore → Phoenix → Denver
Timetable, Phoenix time
13:10WN 452 from Baltimore at the gate
13:00UA 2418 to Denver leaves the gate
23 h 50 apart on the timetable, overnight
UA 2418 leaves 23 h 50 after WN 452 arrives on the timetable: more than half a day, so not a connection we count.