AV 2267 then UA 1278 at San Francisco
Medford → San Francisco → Chicago O'Hare
Timetable, San Francisco time
21:20AV 2267 from Medford at the gate
16:10UA 1278 to Chicago O'Hare leaves the gatealso AC 4674, NZ 9312
18 h 50 apart on the timetable, overnight
UA 1278 leaves 18 h 50 after AV 2267 arrives on the timetable: more than half a day, so not a connection we count.