CZ 1604 then UA 1780 at San Francisco
Los Angeles → San Francisco → Ontario
Timetable, San Francisco time
23:40CZ 1604 from Los Angeles at the gatealso AA 3176, AY 4048, QF 4743, EI 7533
18:50UA 1780 to Ontario leaves the gatealso AC 4423, AC 4548
19 h 10 apart on the timetable, overnight
UA 1780 leaves 19 h 10 after CZ 1604 arrives on the timetable: more than half a day, so not a connection we count.