UA 602 then GG 9723 at O'Hare
Miami → Chicago → Tokyo Narita
Timetable, Chicago time
19:04UA 602 from Miami at the gate
10:30GG 9723 to Tokyo Narita leaves the gate
15 h 26 apart on the timetable, overnight
GG 9723 leaves 15 h 26 after UA 602 arrives on the timetable: more than half a day, so not a connection we count.