CM 1431 then EK 6420 at San Francisco
Redmond → San Francisco → Houston
Timetable, San Francisco time
21:19CM 1431 from Redmond at the gatealso UA 5534
18:35EK 6420 to Houston leaves the gate
21 h 16 apart on the timetable, overnight
EK 6420 leaves 21 h 16 after CM 1431 arrives on the timetable: more than half a day, so not a connection we count.