WS 1540 then UA 3875 at Houston
Calgary → Houston → Melbourne (Florida)
Timetable, Houston time
22:15WS 1540 from Calgary at the gate
22:00UA 3875 to Melbourne (Florida) leaves the gate
23 h 45 apart on the timetable, overnight
UA 3875 leaves 23 h 45 after WS 1540 arrives on the timetable: more than half a day, so not a connection we count.