BA 8341 then UA 1393 at San Francisco
New York JFK → San Francisco → Chicago O'Hare
Timetable, San Francisco time
19:31BA 8341 from New York JFK at the gate
08:20UA 1393 to Chicago O'Hare leaves the gatealso AC 4060, OS 7718, SN 8820, NZ 9306
12 h 49 apart on the timetable, overnight
UA 1393 leaves 12 h 49 after BA 8341 arrives on the timetable: more than half a day, so not a connection we count.