CM 1431 then OZ 9521 at San Francisco
Redmond → San Francisco → Houston
Timetable, San Francisco time
21:19CM 1431 from Redmond at the gatealso UA 5534
16:40OZ 9521 to Houston leaves the gate
19 h 21 apart on the timetable, overnight
OZ 9521 leaves 19 h 21 after CM 1431 arrives on the timetable: more than half a day, so not a connection we count.