QR 20 then AA 3554 at O'Hare
Doha → Chicago → Jacksonville
Timetable, Chicago time
13:42QR 20 from Doha at the gate
13:29AA 3554 to Jacksonville leaves the gate
23 h 47 apart on the timetable, overnight
AA 3554 leaves 23 h 47 after QR 20 arrives on the timetable: more than half a day, so not a connection we count.