AV 2351 then UA 1147 at San Francisco
Denver → San Francisco → Chicago O'Hare
Timetable, San Francisco time
19:11AV 2351 from Denver at the gate
15:20UA 1147 to Chicago O'Hare leaves the gatealso AC 4185, CA 7326, VA 8104, NZ 9313
20 h 09 apart on the timetable, overnight
UA 1147 leaves 20 h 09 after AV 2351 arrives on the timetable: more than half a day, so not a connection we count.