UA 582 then BA 5602 at San Francisco
Boston → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
12:09UA 582 from Boston at the gate
11:20BA 5602 to Dallas-Fort Worth leaves the gate
23 h 11 apart on the timetable, overnight
BA 5602 leaves 23 h 11 after UA 582 arrives on the timetable: more than half a day, so not a connection we count.