AV 2125 then UA 1145 at San Francisco
Portland (Oregon) → San Francisco → Cancún
Timetable, San Francisco time
09:07AV 2125 from Portland (Oregon) at the gate
23:00UA 1145 to Cancún leaves the gate
13 h 53 apart on the timetable
UA 1145 leaves 13 h 53 after AV 2125 arrives on the timetable: more than half a day, so not a connection we count.