BR 646 then UA 8157 at O'Hare
Anchorage → Chicago → Tampa
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
13:55UA 8157 to Tampa leaves the gate
20 h 45 apart on the timetable, overnight
UA 8157 leaves 20 h 45 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.