AV 2104 then UA 1278 at San Francisco
San Luis Obispo → San Francisco → Chicago O'Hare
Timetable, San Francisco time
19:56AV 2104 from San Luis Obispo at the gate
16:10UA 1278 to Chicago O'Hare leaves the gatealso AC 4674, NZ 9312
20 h 14 apart on the timetable, overnight
UA 1278 leaves 20 h 14 after AV 2104 arrives on the timetable: more than half a day, so not a connection we count.