CZ 435 then UA 751 at O'Hare
Anchorage → Chicago → Portland (Oregon)
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
09:00UA 751 to Portland (Oregon) leaves the gate
17 h 02 apart on the timetable, overnight
UA 751 leaves 17 h 02 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.