UA 5192 then AA 2074 at O'Hare
Jacksonville → Chicago → Boston
Timetable, Chicago time
17:30UA 5192 from Jacksonville at the gate
13:37AA 2074 to Boston leaves the gate
20 h 07 apart on the timetable, overnight
AA 2074 leaves 20 h 07 after UA 5192 arrives on the timetable: more than half a day, so not a connection we count.