UA 5191 then WS 1541 at Houston
Oklahoma City → Houston → Calgary
Timetable, Houston time
09:30UA 5191 from Oklahoma City at the gate
08:00WS 1541 to Calgary leaves the gate
22 h 30 apart on the timetable, overnight
WS 1541 leaves 22 h 30 after UA 5191 arrives on the timetable: more than half a day, so not a connection we count.