LA 6139 then BA 5600 at San Francisco
Boston → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
23:58LA 6139 from Boston at the gate
23:23BA 5600 to Dallas-Fort Worth leaves the gatealso CX 7582
23 h 25 apart on the timetable, overnight
BA 5600 leaves 23 h 25 after LA 6139 arrives on the timetable: more than half a day, so not a connection we count.