UA 3852 then BA 5602 at San Francisco
Ontario → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
14:00UA 3852 from Ontario at the gate
11:20BA 5602 to Dallas-Fort Worth leaves the gate
21 h 20 apart on the timetable, overnight
BA 5602 leaves 21 h 20 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.