UA 2091 then GG 9723 at O'Hare
San Francisco → Chicago → Tokyo Narita
Timetable, Chicago time
12:59UA 2091 from San Francisco at the gate
10:30GG 9723 to Tokyo Narita leaves the gate
21 h 31 apart on the timetable, overnight
GG 9723 leaves 21 h 31 after UA 2091 arrives on the timetable: more than half a day, so not a connection we count.