CZ 435 then UA 2811 at O'Hare
Anchorage → Chicago → Las Vegas
Timetable, Chicago time
17:05CZ 435 from Anchorage at the gate
09:00UA 2811 to Las Vegas leaves the gate
15 h 55 apart on the timetable, overnight
UA 2811 leaves 15 h 55 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.