DL 517 then BA 5610 at San Francisco
Atlanta → San Francisco → Chicago O'Hare
Timetable, San Francisco time
18:57DL 517 from Atlanta at the gatealso VS 5289, LA 6387
07:13BA 5610 to Chicago O'Hare leaves the gate
12 h 16 apart on the timetable, overnight
BA 5610 leaves 12 h 16 after DL 517 arrives on the timetable: more than half a day, so not a connection we count.