AA 6491 then WN 4146 at Phoenix
Grand Junction → Phoenix → Chicago Midway
Timetable, Phoenix time
13:50AA 6491 from Grand Junction at the gate
10:05WN 4146 to Chicago Midway leaves the gate
20 h 15 apart on the timetable, overnight
WN 4146 leaves 20 h 15 after AA 6491 arrives on the timetable: more than half a day, so not a connection we count.