UA 4592 then AA 1457 at O'Hare
Omaha → Chicago → Boston
Timetable, Chicago time
20:36UA 4592 from Omaha at the gate
20:00AA 1457 to Boston leaves the gate
23 h 24 apart on the timetable, overnight
AA 1457 leaves 23 h 24 after UA 4592 arrives on the timetable: more than half a day, so not a connection we count.