UA 6047 then AA 3578 at O'Hare
Pittsburgh → Chicago → Northwest Arkansas
Timetable, Chicago time
19:00UA 6047 from Pittsburgh at the gate
18:44AA 3578 to Northwest Arkansas leaves the gate
23 h 44 apart on the timetable, overnight
AA 3578 leaves 23 h 44 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.