UA 3901 then UA 564 at Houston
Phoenix → Houston → Calgary
Timetable, Houston time
09:39UA 3901 from Phoenix at the gate
09:33UA 564 to Calgary leaves the gate
23 h 54 apart on the timetable, overnight
UA 564 leaves 23 h 54 after UA 3901 arrives on the timetable: more than half a day, so not a connection we count.