AA 2421 then GG 9723 at O'Hare
Dallas-Fort Worth → Chicago → Tokyo Narita
Timetable, Chicago time
16:00AA 2421 from Dallas-Fort Worth at the gate
10:30GG 9723 to Tokyo Narita leaves the gate
18 h 30 apart on the timetable, overnight
GG 9723 leaves 18 h 30 after AA 2421 arrives on the timetable: more than half a day, so not a connection we count.