UA 1803 then BR 607 at O'Hare
Pittsburgh → Chicago → Osaka
Timetable, Chicago time
07:23UA 1803 from Pittsburgh at the gate
00:10BR 607 to Osaka leaves the gate
16 h 47 apart on the timetable, overnight
BR 607 leaves 16 h 47 after UA 1803 arrives on the timetable: more than half a day, so not a connection we count.