CA 1017 then UA 1172 at O'Hare
Anchorage → Chicago → Toronto Pearson
Timetable, Chicago time
19:05CA 1017 from Anchorage at the gate
13:57UA 1172 to Toronto Pearson leaves the gate
18 h 52 apart on the timetable, overnight
UA 1172 leaves 18 h 52 after CA 1017 arrives on the timetable: more than half a day, so not a connection we count.