CM 2528 then UA 1905 at San Francisco
Ontario → San Francisco → St Louis
Timetable, San Francisco time
20:10CM 2528 from Ontario at the gatealso AC 4112
12:15UA 1905 to St Louis leaves the gatealso UA 8167
16 h 05 apart on the timetable, overnight
UA 1905 leaves 16 h 05 after CM 2528 arrives on the timetable: more than half a day, so not a connection we count.