BR 642 then UA 3674 at O'Hare
Anchorage → Chicago → Toronto Pearson
Timetable, Chicago time
11:55BR 642 from Anchorage at the gate
11:05UA 3674 to Toronto Pearson leaves the gate
23 h 10 apart on the timetable, overnight
UA 3674 leaves 23 h 10 after BR 642 arrives on the timetable: more than half a day, so not a connection we count.