AF 2610 then UA 3906 at San Francisco
New York JFK → San Francisco → Chicago O'Hare
Timetable, San Francisco time
01:15AF 2610 from New York JFK at the gatealso MU 8671
19:30UA 3906 to Chicago O'Hare leaves the gate
18 h 15 apart on the timetable
UA 3906 leaves 18 h 15 after AF 2610 arrives on the timetable: more than half a day, so not a connection we count.