WN 1306 then UA 3804 at Phoenix
Chicago Midway → Phoenix → Denver
Timetable, Phoenix time
10:15WN 1306 from Chicago Midway at the gate
22:30UA 3804 to Denver leaves the gate
12 h 15 apart on the timetable
UA 3804 leaves 12 h 15 after WN 1306 arrives on the timetable: more than half a day, so not a connection we count.